Astronomy Science Workshop

Asteroid YU55 Flyby (Nov. 8, 2011) - An Observing Dream for Astronomers

2011-11-03T17:20:00.000-07:00

Asteroid 2005 YU55 radar image. (Wikipedia)

On Nov. 8, 2011, asteroid 2005 YU55 will fly by the earth. It will pass closer than the moon is to us, which is kind of scary for some people who think it might hit us. But really, the experts know whether any planetoid out there will be a danger to earth for as long as they've had ample time to study them. Since asteroid YU55 has been known for quite some time, the people on earth really have nothing to fear. According to JPL Goldstone scientist, Marina Brozovic, "We know exactly where it is going to be, and we don't have any chance of impact for the following hundred years." So alright, that's good to know. So it's our grandchildren that will have something to worry about in the future.

But asteroid YU55 isn't really about the end of the world. It's by far the greatest opportunity for astronomers, amateur and professional to be able to get their telescopes set up and see what an asteroid looks like in person and up close. Sure some of you reading this may have already observed a few famous asteroids like Vesta and Ceres, but how they appear in a small telescope would be nothing compared to YU55 as it passes by the earth. At 201,700 miles close and at 1,300 feet wide (about 4 football fields) and seemingly round (which is kind of uncommon for a small asteroid), and black, like charcoal - so it is taunting us in a way, like it's saying, "Come on now, this is a once in a lifetime chance to see a strange asteroid up close, so watch me!"

More details about the path and other things about asteroid YU55 are in The Watchers, and of course, Wikipedia.

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Religiously Observing Jupiter Pays Off for Christopher Go After Unknown Object Impacts

2010-06-23T18:06:00.000-07:00

Christopher Go is an amateur astronomer in the Philippines. He's know for taking pictures of Jupiter and observing the change in color of a spot on Jupiter called Red Spot Jr. He alerted astronomy authorities about it. Now, he's known worldwide. That was back in February of 2006. Ten years later, on June 3, 2010, it seems his religious observation of Jupiter had paid off again when he documented the impact of a large object on Jupiter on video. The event, which he confirmed with the footage, was actually observed by his friend, Australian astronomer, Anthony Wesley.

The object that hit Jupiter was unknown, but it hit in these coordinates: Jovian latitude minus 16.1°, and central meridian longitudes CM1: 300°, CM2: 33.8° and CM3: 210.4°."The impact produced a flash that was likely the result of the object exploding in the Jovian atmosphere. It is likely an asteroid. The photo and cropped detail shown here is from a still of the video made by Go of the event.

Wesley and Go (left) are now well-known Jupiter observers. Their success proves that it pays to keep an eye on Jupiter with your telescope. If you have the equipment to take photos and video, then you can capture events that professional astronomers may be too busy to notice. Jupiter presents a nice disk where anything can happen. Cloud patterns change and you never know if another object hits it. If you watch the video, you will see a faint flash (impact) first followed by a larger one (explosion). Here is the link to the video of Christopher Go of the Jupiter-impact event. It was posted on YouTube by kurtjmac: http://www.youtube.com/watch?v=0AXSA9rZzrU.

You can follow Christopher Go's observations of Jupiter here: http://jupiter.cstoneind.com/

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New Cave Skylight Found on Pavonis Mons on Mars by 7th Graders

2010-06-21T17:29:00.000-07:00

What could make the life of seventh grader more exciting and lead them more into the planetary sciences? The answer is the discovery of a cave on Mars! That's exactly what happened to 7th graders in California who were participating in the Mars Student Imaging Program at the Mars Space Flight Facility at Arizona State University. This program lets students pose a question and to use a Mars orbiter to take pictures of the surface in order to find the answer.

The students were from Evergreen Middle School in Cottonwood, California. They were able to commission a Mars Orbiting Camera to search for lava tubes in the area of Pavonis Mons, a volcano where another cave was found in 2007 by geologist Glen Cushing, who suggested that the openings (left; previously-discovered cave) were skylights or holes in lava tubes created after a part of the roof collapsed. He estimated the hole to be over 600 feet wide and nearly 400 feet deep.

The students wanted to determine the likely places lava tubes could be found on Mars. The photographs of their chosen location did indeed show tubes. The cave was a bonus that made the news. The pictures were taken by the Mars Odyssey orbiter with its Thermal Emission Imaging System (THEMIS) instrument. Dennis Mitchell, the teacher of the students, remarked that the program is one of the "greatest educational programs ever developed."

If you happen to have access to high-resolution photos of the surface of Mars, why don't you go over them? You may likely discover something new just like what these students did. You may not have access to the Mars Odyssey, but there's the chance that you will find something that's not noticed before.

NOTE: he images on the left relate to previous discoveries. The pictures are from NASA.

So you're wondering what lies inside the Martian caves, eh? Well, for now, they are forbidden places! Nevertheless, why not let your imagination on the subject loose with this Forbidden Planet, Robby the Robot model kit! Click here or on the image to order.

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The Sound of Outer Space Comes from Saturn

2010-05-24T23:22:00.000-07:00

Saturn, a beautiful ringed orb hanging in the darkness of space. That's how you see it in a telescope. It speaks to you of mysteries in space. Have you ever wondered what Saturn would sound like if you can hear it? The Cassini spacecraft, which was sent to this wonderful ringed planet, has captured its radio emissions from energetic auroras which has been compressed and translated by the National Aeronautics and Space Administration (NASA) into sounds that we can hear and appreciate.

If you've ever wondered what space sounds like, then you can listen to the voice of Saturn. There are many other "voices" out there coming in from different levels of the electromagnetic spectrum, but Saturn's is one for the books because its sounds really does remind us of the vastness immensity of space. Note that 73 seconds of playback of the sounds of Saturn is really equivalent to 27 minutes in real time. The frequency had also been lowered to a range audible to the human ear.

Click here to listen to the eerie voice of Saturn.

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SkyXplore Begins SpaceDome Mobile Digital Planetarium Project in the Philippines

2010-05-17T18:54:00.000-07:00

The Diliman Preparatory School in Quezon City in the Philippines has launched its SkyXplore project with the SpaceDome Mobile Digital Planetarium as the main attraction. The astronomy education program is headed by former Philippine Senator Nikki Coseteng and aims to bring astronomy closer to the Filipino student through the inflatable planetarium, creating new windows for education and opening doors to new careers in science and technology. As of this writing, only the Rizal Technological University offers degree courses in astronomy.

The planetarium will be taken to schools nationwide to promote astronomy and to educate students in the science. She will be aided by astronomy consultants like Frederick Gabriana and wife Rochelle (2nd picture from the top). Lecturers include Ramon Acevedo, resident astronomer of the Seven Suites Observatory Hotel in Antipolo City. The planetarium currently shows the sky as seen by different cultures (like the Inuit and Lakota) with the Western view taking precedence.

Astronomer Gabriana will soon by integrating Philippine constellations in the open source program used with the planetarium computer and projector. He will be using the research of Historian Dr. Dante Ambrosio of the University of the Philippines. It will be the first time that the sky as seen by indigenous peoples of the Philippines will be featured in a planetarium program. Aside from stars, planets, and constellations, the planetarium is also capable of taking the viewer on a travel through time and space. It's also for showing movies. Shown at left is Coseteng presenting the meteorite collection of the Gabrianas which was originally part of the Allen Yu space rock collection.

Nikki Coseteng launches SkyXplore -Scienceray

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Venus Disappears behind the Moon (Metro Manila, Philippines, May 16, 2010, 7:36 PM.)

2010-05-16T18:58:00.000-07:00

The sky was clear and the air still. Just after sunset on the 16th of May in the Philippines and elsewhere, people saw something beautiful in the sky. It was the setting crescent Moon with Venus just above the darkened part of the lunar disk. Not everyone knew it was coming, but it was really a spectacle that was hard to miss. "Beautiful!" People said, and they took photographs with their cell phones. The next day, the event was the main story featured on Yahoo!.

Yes, Venus and the Moon together was a beautiful sight. Venus is actually on the opposite side of the Sun and it's position relative to the moon the that day made for an astronomy spectacle for everyone. But after looking at the two together for a while and taking photographs, most people went on their way. Little did they know that if they had waited a bit longer, they would have witnessed Venus move closer to the Moon and wink out as it is finally fully obscured by the lunar disk in what is called, by the way, a lunar occultation.

For those who didn't realize that the Moon would cover Venus, well, it happened at 7:36 pm. If they had waited, they would have seen Venus move closer to the lunar disk's edge and slowly weaken in brightness until it gets "snuffed out" like a candle - but we all know that it's just behind the Moon!

Superstitious people have asked the significance of such an alignment of the Moon and Venus. But really, there's nothing to it from the scientific point of view. It's just one object blocking the view of another in space. But historically, the "crescent Moon and star" is a recurring symbol in the Islamic world since ancient times and the motif appears in several Islamic country flags (left).

As early as the 14th century B.C., the crescent and star symbol was already associated with the Moabites of the book of Genesis in the Bible. It was also a part of Sumerian iconography with the crescent representing the Moon god Sin, and the star representing the goddess of fertility, Ishtar.

It really pays to look at the sky sometimes even when you're not expecting anything to see or happen. You might get lucky like the hundreds of people who saw Venus and the Moon together. Luckier were the ones who waited to see Venus get covered up by the Moon and then appear again later at the other side. It would have taken a lot of patience, though!

The pictures here were taken by this writer with a cellphone camera, thus, there is slight image elongation. The photo on top shows Venus as it nears the lunar disk. The smaller one at the left shows Venus just before it hid behind the Moon.The orange blur at the top left corner is a plane that has just left the airport.

See more spectacular photos and videos of the May 16, 2010 lunar occultation of Venus over the Philippines in Erica Valdueza's The Sky Above.

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If You Find a Meteorite, Can You Really Claim It?

2010-02-10T20:08:00.000-08:00

Astronomers, amateur and professionals alike, always dream of finding a meteorite. It's even more exciting if the meteorite is found just after it hits. Consider yourself very lucky if the meteorite falls somewhere near you and you get to retrieve it while it's fresh. But does finding and simply picking up a meteorite make it your own? Can you lay claim to it without anybody else contesting the legitimacy of your ownership?

The answer to both is yes... that is... if you, the one who found the meteorite, is also the owner of the land it slammed into. This means that if you found a meteorite on someone else's property, the landowner has the right to claim the object as his, never mind if it journeyed for millions of years in space before hitting dirt. While laws in different places may differ, it just shows that picking a meteorite up from the ground does not automatically make it yours.

Meteorites can fetch a lot of money, especially for specimens that cause a ruckus and are found right after impacting. These meteorites become popular and when broken in pieces, it can make a lot of money for the owner. Apart from museums and research institutions, collectors worldwide are willing to pay big for really good and popular specimens. Meteorites are like long lost treasures. But while the founder of lost treasures generally get a share of the bounty along with the owner of the land and the government, meteorites pose questions that require the services of good lawyers.

Just consider what happened at Williamsburg Square, in Lorton Virginia, USA in January 2009. A meteorite (top and left) crashed through the roof of a building and into a doctors' office. One doctor thought that a bookshelf had fallen on his partner after he heard a boom. But it turned out, a mango-sized meteorite was responsible for the explosion. It hit with such force that it embedded pieces of ceiling tiles into the floor, going through the carpet. The doctors were thankful the meteorite didn't hit any of them because it fell on a spot where they usually sit. The doctors placed the meteorite fragments in a box and sent them to the Smithsonian Museum of Natural History where it was confirmed as a meteorite by scientist Cari Corrigan. She said it was likely traveling at 350kph when it hit.

You'd think that the Lorton meteorite has found it's final resting place in the Smithsonian? but no, the owner of the building it crashed into has laid claim to the space rock. The Smithsonian says it will hold on to the meteorite until ownership is resolved. It's up to history to say where the rock will end up.

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Buy Telescopes in the Philippines

2009-12-21T16:01:00.000-08:00

In the Philippines, there are lots of astronomy enthusiasts. Many of them are young people dreaming of owning a telescope and using it to "go where no one has gone before." Well, for most of them, the dream just remains a dream. The common problem is looking for a telescope to buy. It's a fact (at least as of this writing) that good telescopes can be hard to find in the Philippines. But the good news is that astronomy groups and organizations have stepped in to fill the void and help make telescopes more available in a country where food takes precedence over everything else.

Telescopes are a luxury in the Philippines but you only have to know where you can find them and then you can pick the right one for you, whether you're a beginner or an advanced hobbyist. For starters, some popular retail stores in the country like the outdoor sports store, Hahn, and sometimes, even National Bookstore, sell telescopes. These are usually refractors designed for land gazing, but you may come upon a fine 2 or 3 inch reflector that's more appropriate for star gazing.

In mall toy stores in the Philippines, you can also find maybe two or three small telescopes, but these will likely be just toys to encourage budding youngsters in the study of science. While you can always try to order a telescope online, the shipping expenses involved may not make that a practical move, unless the purchase is going to be funded by a corporate entity or institution. For telescopes for personal use that are affordable yet useful, you should go to individual dealers of local astronomy clubs. There won't be a lot of choices, and some will be hand made (especially the mirrors), but that's okay. They know their stuff and you can bet that you will also get reliable advice.

The astronomy/telescope community in the Philippines really revolves around the major national groups like the Philippine Astronomical Society (PAS) and the Astronomy League of the Philippines (ALP), but there are school organizations and regional/local groups that can point you to the right person. Information about them can be obtained from their websites and blogs like this one can be pretty useful in finding an astronomical telescope that you can buy.

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Perchance to See the Perseids in the Rainy Season

2009-08-12T18:07:00.000-07:00

The Perseid meteor shower (August 11-13) is perhaps the most anticipated every year because of the high frequency of meteors. In 2009, it's hyped for it's up to 200-meteors-an-hour frequency. Still, the Perseids is one shower that not everyone can appreciate, especially if you're somewhere in the world where it's the rainy season. Yes, areas like Southeast Asia usually get typhoons in August and it's almost always cloudy. Residents of countries like the Philippines, where meteor shower gazing has gained popularity in the past decade, always have trouble appreciating the Perseids. So what can be done?

It's really beyond your control to change the weather where you're at, so the next best thing might be to take a look at satellite weather photos and try to determine the place in your country where there will be clear skies. If there are storms, ask the weather bureau where the skies will likely be clear when the shower comes, which is usually on the 12th and 13th of August. More often than not, you may need to fly to the selected place for observation and get accommodations well ahead.

Choose a place on the map where you can expect crystal clear skies. These areas will be obvious on weather satellite images. It pays to plan ahead and get to know the place a little bit by researching over the Internet. You have to consider ease of travel and security. Of course, you also have to determine if there's a place where you can observe the shower in peace and away from city lights. If you are in a group, consider getting assistance from a travel agency specializing in the place you've chosen.

Observing meteor showers is really easy. The best thing to do is to lie down on the ground just after sunset, look up and wait for the meteors to light up the sky, like the one in the photo above by Mila Zinkova. You may be lucky to get a few surprises like bolides, which are big meteors that break up upon entering the atmosphere! The Perseids would appear to have a central origin, the radiant, in the vicinity of the constellation Perseus (left).

If, despite your efforts, no suitable place to observe the Perseids has been arrived at. Then you can contact someone from another country and have that person do the observing for you. Documenting the shower with either a still or video camera is a good idea. If you don't know anyone else on this earth willing to do the observations for you, then just wait for the Geminid meteor shower. It's supposedly the next best thing to the Perseids, and it happens in December - on the 12th and 13th. Skies are usually crystal clear on that month and you'd likely get a good show.

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Serendipity Counts for a Lot of Astronomy Discoveries: Comet Impact on Jupiter Seen by Australian Amateur Astronomer

2009-07-21T17:31:00.002-07:00

Space is a big place and we only have the sky to peek into it. Even with our computer-guided telescopes, we cannot always be at the right place at the right time to see things happen. Fortunately, with a little serendipity and patience, sometimes, your sky viewing will pay off and you, the amateur, or casual star gazer get to make discoveries that will amaze even our friends at NASA.

Take for example, what happened on July 19, 2009 at the Murrumbateman (north of Canberra) home of Australian amateur astronomer and computer programmer, Anthony Wesley (44). He was observing Jupiter in his backyard with his 14.5-inch reflecting telescope when he saw what appeared to be a dark spot on Jupiter. He didn't immediately notice it, taking 30 minutes before he realized it was something else as it rotated for a better view and atmospheric conditions improved.

Wesley described the spot as a "truly black spot in all channels"and initially thought it was a dark polar storm. NASA JPL scientist Glenn Orton confirmed that the spot was a comet impact which caused underlying gases to well up and be seen distinctly in reverse in the infrared photograph above taken by the NASA Infrared Telescope Facility in Hawaii. He says they are extremely lucky to have an impact site at the right place at the right time as Jupiter rotates it more into view. As of this writing, they expect to observe how the spot changes in the next few days.

So, take the hint. If you are always stargazing and paying close attention to bodies like Jupiter (where things are easier to "spot" - pardon the pun), then you may just get serendipitous and make the discovery of the year! Note that in 2006, Filipino astronomer Christopher Go was also at the right place and time when he observed the Oval BA spot or Red Spot Jr. (left; to the left of the Great Red Spot) on Jupiter change shade.

In 1994, when the Shoemaker-Levy fragments crashed into Jupiter, similar black impact spots were made which were clearly visible using my 3-inch reflector. Of course, I already knew they were there, but remember that there's always the chance of spotting something new. Even a small telescope like that can give you astonishing results!

Read about the discovery and see the extraordinary amateur pictures of the impact from Anthony Wesley's website: www.acquerra.com.au/astro

Tektites Rock! How to Find and Collect Tektites

2009-04-27T21:59:00.000-07:00

You've probably heard of that asteroid tracked to it's explosive demise over the Sudan desert in 2008 (fragment shown at left). Only a few meters across, it didn't survive intact and shattered before it hit the ground, sending hundreds of debris strewn on the desert sand. Eventually, fragments of the doomed asteroid were recovered. It was easy because astronomers knew where it went and it also left fireball dust like in the following picture left behind by the Almahata Sitta fireball.

A lot of meteorite collectors would have scrambled to get a piece of Asteroid 2008 TC3 if they also knew where to look. But the fact is that meteorites are quite difficult to find. Usually, scientists look for them on ice fields, where they stand out starkly against the white ice. Others prefer vast stretches of sandy desert, where they also stand out like sore thumbs. But of course, not everyone has the means to travel to the North Pole or the Empty Quarter of Saudi Arabia just to hunt to meteorites.

The next best thing to collecting such souvenir rocks from space is to simply collect tektites (top pic from http://www.tektites.co.uk/). Tektites, of course, are rocks that are the result of asteroids that have impacted Earth in the past. thrown high above the atmosphere as molten globs that solidified, they form strange shapes upon reentry into the atmosphere since they are melted again. They drop to the ground, on what are called strewn fields, as odd rocks that do not match others on the ground.

Here is a table of major tektite strewn fields in the world:

Name	Location	Age (millionyears)
Australasian	Australia, Tasmania, Indonesia, Philippines, and most of Southeast Asia	0.75
Czechoslovakian	Czech Republic	14.8
North American	Texas, Georgia, Martha's Vineyard, Cuba	35
Ivory Coast	Ivory Coast of Africa	~ 1.0
Libyan	Libyan Desert	28.5
Irgiz	North of the Aral Sea	1.07
Aouelloul	Mauritania (West Africa)	3.5

If you live in a country or in a specific area that's part of a major strewn field, then you're lucky, because the chances of you finding tektites is high. In the Philippines, for instance, tektites are regularly collected and sold as amulets in Manila. People simply go and walk by the side of rivers and over fields to look for them. They are simply visually sorted out and picked up by hand from the other rocks on the ground. Most are small - an inch or two, but some can be as big as five inches in diameter or even more, although these big tektites are rare. Dr. Henry Otley Beyer (left), the renowned American anthropologist who lived with the Ifugaos, did most of the collecting of Philippinites. His collection now forms part of the National Museum displays, including those at the Planetarium at the Luneta park.

Of course, you have to know what tektites look like in order for you to find them. Most are dark and grooved, but others, like Libyan desert glass (left), are translucent and appear shattered. You can see samples of how tektites look here in this entry in Wikipedia. There you'll also see how some rocks like sandstone can have the shape, but not the texture and color of a tektite.

FACT: In the Philippines, tektites were once collected in Ortigas in Metro Manila. Today, there are the Tektite towers that stand along Exchange road to remind us of the richness of the area for tektites! You can check out one of the abstracts of the research papers where a find in the Ortigas site is mentioned, here at the SAO/NASA Astrophysics Data System. Just type the words "tektites" and "ortigas" together and you'll find it.

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Night Time Fun at the Harry Bayley Observatory

2009-02-18T20:47:00.000-08:00

by The Wandering Scotsman

Last night I finally had the chance to spend an evening at the Harry Bayley Observatory here in Barbados, doing a wee bit of stargazing as well as getting the opportunity to see the moon close up.

The Harry Bayley Observatory is located in the Parish of St Michal; it is fairly easy to find, fortunately the directions we were giving over the phone were very accurate, if you head down Observatory Road you cant really miss it.

The observatory is named after Harry Bayley who founded the Barbados Astronomical Society and was built in 1963. We arrived early at about 8.45pm but things didn't really get going until 9.30pm. The observatory is only open to the public on a Friday and obviously it is only open, weather permitting.

The entrance fee was $12BDs for adults and $6BDS for children, which in my opinion was money well spent. The Harry Bayley Observatory is the only one in the Eastern Caribbean and the telescope used is a Celestron 14 inch telescope. I know they Society has long-term plans to upgrade their equipment and hopefully they will eventually raise the funds to do so.

This was my first trip to an observatory and I had been looking forward to it all week and I had been constantly checking the BBC weather forecast online to make sure the weather was going to be dry and clear. The excitement really started to kick in for me as I climbed the stairs as to the top of the observatory. As soon as I reached the top of the observatory I witnessed my first ever shooting star, what an amazing site.

Once at the top of the Harry Bayley Observatory the first thing you notice is the great nighttime view of Bridgetown. It was sure was fascinating learning about the various stars and constellations, which I have being seeing in the sky above Barbados since my arrival on the island.

I was looking out for little green men on the surface of the moon, but all was quiet and they must have been in their beds. The guys of the astronomical society are all very knowledgeable and passionate about astronomy and make it a really enjoyable and informative experience.

What I had originally thought was a satellite, was in fact Sirius, also known as the Dog Star, which is in fact the brightest star in the night time sky. Sirius appears so bright because of its closeness to earth and its luminosity. Did you know that Sirius could be seen from almost every inhabited region of the Earths surface, with only those living north of 73 degrees unable to see it.

The Harry Bayley Observatory is a fun and enjoyable evening out for all members of the family, it is something different and I will be back again in March when things will be a wee bit different up in the sky above Barbados.

Recently I have been amazed by the amount of stars that I have seen in the sky above Barbados, Star Struck In Barbados.

About the Author

I'm a budding Scottish entrepreneur now living on the Caribbean Island of Barbados trying to make a few dollars. I'm always on the lookout for business partners who are aiming to get involved in making money in Barbados through innovative business ventures.

I Garry A Wynters, "The Wandering Scotsman" and can be found at my two Barbados blogs, http://thebarbadosblog.com and the http://barbadosphotoblog.com.

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Sky Sweeping with Your Eyes, Binoculars, and a Small Telescope

2009-01-15T02:19:00.000-08:00

When you've grown to be all too familiar with the sky that you already know where to look in order to find an object, it sometimes get's to be tiresome when you see the same sights over and over. But the fact is that you can literally have a lot of things to see while stargazing. In spite of how the sky appears to be unchanging beyond the shifts of the seasons, it is really full of surprises.

Naked-eye stargazing is one activity where you can experience how the universe, or particularly the night sky, reveals some random events. Meteor showers, for instance, while predictable, actually provide a number of oohs and aahs when you happen to witness some unique displays like bolides or large meteors.

With the use of binoculars, you can even see more detail when it comes to certain areas of the sky, like that occupied by Orion the Hunter. With a pair of handy binoculars, you'll be able to sweep the sky with your eyes, focusing on a few things that cross your field of view. However, with the use of a small telescope on a tripod, the experience is considerable different compared to when using just your naked eyes or binoculars.

With a sturdy tripod, your small telescope can be an exciting tool into a space adventure. Lots of things are happening out there in space. It's not farfetched that while slowly sweeping the sky with your telescope on a tripod, an artificial satellite might suddenly cross your view. You have to be quick to follow it because it will be quick to pass. It may dim and brighten at regular intervals as it rotates, reflecting the sun at different angles.

There are many other things that can surprise you when sky sweeping. Sometimes, if you can't tell what it is, then it may qualify as unidentified, but it would likely not be an alien.

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Finding The Best Tripods and Mounts For Your Binoculars

2008-11-13T21:22:00.000-08:00

by Derek Robinson

Many mounts are available for all your birdwatching and astronomy needs, and options vary widely to accommodate the particular optical device you use. Inevitably, selecting the right mount or tripod means finding a compromise between weight, size, and stability. While stronger, heavier mounts will obviously provide more strength for larger sets, some trades are made in terms of convenience and portability.

Bushnell offers a number of binocular accessories including tripods which come in a wide range of price points and specialties. While some are meant to be mounted on a table, others are best placed on the ground. There are even car window mounts for when you don't want to leave the vehicle. Their table top tripod is only 9 inches tall, with a weight of only 1 lb, and a price less then $20. This could be an excellent Christmas gift for that friend who has everything, and can easily be placed on a patio table or picnic table for convenient, portable outside use.

Field tripods are larger, and while you want to keep them reasonable for carrying, they also tend to offer a little more strength for larger spotting scopes and binoculars. For example, Bushnell binoculars field tripods offers a maximum height of only 3 feet, although it has three leg sections so you can adjust it to the height you need up to those 3 feet. It still weights in at only 1 lb, and is a birdwatcher's favorite for portability and strength. At less than $60 it is also another great option for Christmas gift-giving.

Apart from size, smooth operating tripod heads are a necessity for birdwatching. You just don't want to be fighting to turn the head around the right way when that rare bird appears, so it's important to have a reliable head that will move smoothly. It will also be worth it to spend some time working with the head in advance to determine it's range of movement and how best to manipulate it while keeping it in control. That way you won't be wildly whipping it around to catch that endangered raptor, hoping to get it set up properly before it's too late.

If you use more than one set of binoculars or other optical devices, there are mount adapters available that allow you to use any set of binoculars of any brand on your existing mount. In using one, you can quickly and easily set your binoculars on a tripod even when you usually use them in-hand. If you have giant lenses this would be particularly useful when you want to survey a large area while birdwatching over extended periods. It could also be useful for hunters who want to set up camp and watch moving herds at dusk, and those who may use their existing night vision binoculars for surveillance during neighborhood watch.

Some mounts for astronomical purpose add even more exciting features. While these can improve your experience considerably, naturally they add weight and size and may only be reasonable when you plan to set up a scope that can be left in place. These mounts are usually bigger and heavier, and may be used on your patio or even if you just plan to set them up in one spot and leave them there for the night. For example, Oberwerk binoculars offer a mirror mount for giant binoculars used to stargaze. This sets up more like a microscope, as you mount the binoculars so they point at the mirror. The night sky is reflected in the mirror then up through the binoculars. Ultimately you end up looking down diagonally, rather than up through the binoculars. For some this angle is much more comfortable, particularly with telescope binoculars or giant binoculars. These larger optical devices can be uncomfortable to use when pointed diagonally up rather than down. When you're using them for long periods of time, the right mounting device certainly enhance your comfort.

That said, you will want to be careful handling such mounts, not only because they are heavy, but because the added glass can be fragile. You wouldn't want to drop one of these mounts once you have invested in one. With a price range of about $170-220, this can be a great option, provided you have a deck or other permanent mounting area.

While choosing mounts takes a little extra time, and certainly incurs some added investment, it can be a big difference towards enjoying birdwatching or stargazing. Nobody wants to end up with a neck or arm ache from holding optical devices up, nor from struggling to keep binoculars trained on an image. Do take the extra time to consider your mount options, as it can help you gain hours of enjoyment with your giant binoculars, night vision binoculars, or rangefinders.

About the Author

Derek Robinson is a keen outdoorsman who contributes regularly for many websites including The Binocular Site which is the premier consumer site about binoculars, monoculars, spotting scopes and much more at http://www.thebinocularsite.com

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How Do Telescopes Work - Telescope Lenses

2008-10-31T01:28:00.000-07:00

by John B. Mayall

Lenses and mirrors are the elements used to collect and view focused light in telescopes. Mirrors are the medium for focusing in reflector telescopes, while lenses are the medium in refractors. Each type has its own distinct advantages and disadvantages. Refractor type telescopes use lenses. These lenses bend the light when it enters the telescope from the distant object being viewed through it. Because of this refraction it is possible to closely view a distant object. The telescope has two lenses, with one slightly larger.

The eyepiece in the telescope is generally a small lens. Some telescope however, may not use lenses for the eyepiece at all. The eyepiece, in any case, is the most important element of a telescope. It is the element which lets you see correctly whatever it is that you want to focus on. These eyepieces are adjustable and are of a low power. Adjusting the eyepiece allows you to change the magnification factor. What kind of lens you use for the eyepiece is a personal choice. In today's age, several different kinds of eyepieces are available in the market. Because of this motley available, choosing the correct eyepiece fro your requirement may be a difficult task. As a result, you should concentrate on defining the criteria you think are important for your choice. The depth of field, optical quality, sharpness, clarity, brightness, market price, barrel size and how it affects your eyesight are some of the major points of concern. However these criteria always remain individual prerogatives.

Lens designs used in older telescopes go by the name of Huygens and Ramsden. Professional astronomers are advised to not use these lenses anymore as they are not of superior quality, even though they are comparatively less expensive than other market lenses. These lenses also do not provide correction for chromatic aberration or the light circles that form around brighter objects when they are viewed.

Professional astronomers use orthoscopic lenses that are designed specifically for professional stargazing. Even amateurs will find these lenses good for their telescopes. The orthoscopic telescopes use four lenses in the eyepiece, and have a 45 degree field of vision (FOV). Since the eyepiece is the element most important to the quality of a telescope, this design is a winner. The lenses do not strain the user's eyes, and can be used even for viewing closer objects like planets.

For a person with a moderate budget, a Barlow lens is a viable option. The design provides average quality but is a good bargain. It does not burn a hole in one's pocket, and yet is not of inferior quality because of its cost. The range at which this lens is available starts at a low $30 and goes up to $70. The magnification factor is generally not enough for professional use, however for amateurs it should be enough. For hobbyists, it is an ideal lens.

When you're looking for lenses for a telescope, it is important that you determine criteria that most comprehensively fulfill your needs from the lens. Adjustable lenses is a good option as it means you can view objects which are not too far, as well as distant stars with it, and thus obtain the best deal your money can buy you.

About the Author

Download free hubble image space telescope as well as learning more about refractor vs reflector telescopes when you visit http://www.howdotelescopeswork.com, the online portal for free resource on telescopes making and usage

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Illinois - Adler Planetarium - A Great Vacation and Travel Destination

2008-10-26T19:47:00.000-07:00

by Robert W. Benjamin

Do you like looking at the stars? If so, and you plan on passing through Illinois, you must stop at the Adler Planetarium. This Planetarium is amazing and it really does have something for everyone. One of the greatest parts about it is there are free daily activities that everyone can enjoy.

There are many different activities that may take place and they do change from time to time. Some of them include hands on science challenges, while others include tours of new exhibits. There are also computer activities, interactive demonstrations, astronomy crafts, and telescope viewing. There are some great activities for kids as young as three, all the way up to adulthood.

Check out how craters are formed and how space rocks impact the earth. Or, check out how gravity works and then move on to the create a comet demonstration. Some people like the cosmic ray detectives class while others enjoy learning more about auroras.

The planetarium is open from Sunday through Saturday from 9:30 am until 4:30 pm. The first Friday of every month has later hours until 10 pm. The holiday schedule changes so it is important to check out the times to know when to visit. The planetarium is always closed on Thanksgiving Day and Christmas Day. During the summer months, there are extended hours as well.

The Adler Planetarium sells tickets only from the box office on a first come first serve basis. For adults the general admission is $10 for exhibits only, $19 for admission and a show, and $23 for admission and two shows. Prices for Chicago residents are two dollars less per package. Kids pay $6 for general admission, $15 for admission and a show, and $19 for two shows in addition to admission. Learn more about space and have fun as an entire family by visiting the Adler Planetarium. It is affordable and has great hours, so make a plan to check it out when you are visiting Illinois.

There is a website that has great information on USA Vacations and Unique Travel Spots Listed State By State and Season, the website is called: Seasonal Vacation Spots, and can be found at this url: http://www.seasonalvacationspots.com

By Robert W. Benjamin

You may publish this article in your ezine, newsletter, or on your web site as long as it is reprinted in its entirety and without modification except for formatting needs or grammar corrections.

About the Author

Robert W. Benjamin has been in the software business on the Internet for over 8 years, and has been producing low-cost software for numerous years. He first released public domain products on the AMIGA and C64 computer systems in the late 1970s-80s.

RC Helicopters World

http://www.rchelicoptersworld.com

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Black Hole Facts

2008-10-17T22:32:00.000-07:00

by Roger Smith

If you are into science, astronomy or even science fiction, you probably are amazed at the phenomenon called black holes. Black holes by their very name convey mystery and intrigue and while man has theorized about the existence of black holes since the late 1700's, we are still a long way off to knowing precisely what black holes are and how they behave today.

What is a Black Hole? One of the questions most people have about black holes is exactly what they are. Black holes are theorized to be areas of space in which the gravitational field is so strong and powerful that nothing can escape and break passed its grasp. In fact, black holes show up as completely void areas of space, because not even light can escape the strong gravitational forces. It is believed that a black hole is caused by a large star imploding onto itself creating tremendous density and thus incredibly strong gravitation forces.

The Life of a Black Hole Black holes as stated above are caused by a large star- much larger than our own sun imploding. These large stars run out of fuel which is necessary for nuclear reaction. Unfortunately, as the star runs out of fuel, the effect of normally pushing energy out is outweighed by its own gravity which continues to grow exponentially until the star incredibly crushes itself. It crushes itself to such a degree that its mass becomes super dense creating incredible forces of gravity that do not let anything escape its force. It should be noted that a black hole does not last for ever, while it does not allow light to escape, x-ray radiation is emitted and eventually black holes become smaller and smaller till eventually they disappear.

Where are Black Holes Located? One of the most noticeable aspects of black holes is that they usually can be easily located due to the fact that they are completely void areas of space. Black holes have been located throughout our universe in several galaxies. It was theorized that there was even a black hole in our galaxy- the Milky Way, however for a long period of time the evidence was not complete. Recently however, a black hole was discovered in our own galaxy- actually in the center turning many astronomers' theories on their heads.

For more information regarding black holes, the Smithsonian Magazine has a fascinating article on the subject. To read it, please visit our main website.

About the Author

http://www.smithsonianmag.com Smithsonian magazine is a monthly magazine created for modern, well-rounded individuals with diverse interests. It chronicles the arts, history, sciences and popular culture of the times. Each month, expect articles from the Smithsonian Institution's award-winning, monthly general interest magazine, plus exclusive Web articles, videos, blogs, photographs and more.

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Naming Stars in Different Cultures

2008-10-17T22:07:00.000-07:00

by Richard Pickering

While modern astronomers refer to most stars solely by catalog numbers and astronomy coordinates, many people informally name stars using name a star services. In fact, throughout history people from various cultures have used star names of their own choosing. Many civilizations explained their existence through mythological stories passed from generation to generation, and often associated these stories with the stars in the night sky. As we'll see, even a major car company is named after the stars.

To illustrate, let's start with a constellation (an area of the night sky) modern astronomers have named after a character from Greek and Roman mythology - "Orion," the Great Hunter. Orion is one of the most well known and easily-identifiable constellations, and can be seen from just about anywhere on Earth: The best time to view Orion is during the evening hours between roughly December and March. Many classical mythology stories are told about Orion and how he came to be placed in the heavens. One such story is that Orion had no fear of any animal and therefore threatened to exterminate all of the animals of the earth. When Gaia, the goddess of the earth, heard this she became enraged and sent a scorpion to kill Orion. When Orion encountered the scorpion he was unable to kill it, and the scorpion stung Orion and sent him falling to the earth, fatally wounded. In honor of this story, Orion was placed in the night sky as a constellation, as was the scorpion - known as the constellation "Scorpius."

While 21st century astronomers refer to the constellation "Orion" after a hunter from classical mythology, other cultures have had different interpretations of these same stars. One of the distinguishing features of Orion is a line of three, bright stars that form what is called "The Belt of Orion." The ancient Egyptians thought these three bright stars were the resting place of the god Osiris. The Dogon people of West Africa viewed the three stars as the stairway to heaven. These same three stars have been associated with Christmas, viewed as representing the Magi - "The Three Wise Men" (The Three Kings) from the Bible. The people of the Marshall Islands viewed Orion's stars as an octopus and a fisherman: The story told was of a fisherman who was attacked by an octopus. The fisherman defended himself by using a stone to stab the head of the octopus. Although the octopus was wounded he was able to spray his ink, behind which he hid and was able to escape. The Chimu Indians of Peru believed that the middle star of Orion's belt represented a thief or mischief maker that the Moon Goddess punished. The Moon Goddess punished the wrongdoer by sending two stars to capture him and send him to four vultures that would eat him. This mythological story served as a warning for those who would commit crimes.

Another interesting example from classical mythology is related to a beautiful group of stars in the constellation Taurus called "The Pleiades," or "The Seven Sisters." These stars are visible in the evening sky from roughly November through April, and are often confused with "The Little Dipper" (which is in another constellation) as the bright stars of the Pleiades together resemble a very small dipper, or ladle. The story from classical mythology is that Orion, the hunter, became enamored of these seven beautiful ladies, and relentlessly pursued them throughout the world. Taking pity on the young women, Zeus placed them in the heavens where Orion continues to pursue them in the night sky.

Many cultures have also associated the Pleiades with females or femininity. The Australian Aborigines saw this group of stars as a cluster of girls who were musicians. These girls play their instruments for a group of young boys who are represented by the stars seen in Orion's belt. Some Native American tribes viewed the Pleiades as seven mothers who were looking for their seven lost sons: According to the Chumash Indians of California, these seven sons had become the stars of the Big Dipper. The Kiowa Indians saw these stars as young women who were placed in the heavens by the Great Spirit so as to save them from attacking bears. In Norse mythology, they were the hens of Freya, the goddess of love, beauty and fertility. In Japan the Pleiades were known as "Subaru," after which a Japanese car company is named.

Naming stars, then, is an age-old custom that has been practiced by different civilizations around the world.

About the Author

Richard Pickering is an astronomer for Name A Star Live. While no star-naming service can change the scientific designations of stars, only Name A Star Live makes it real by providing you: Virtual Planetarium™ astronomy software; an opportunity to view your star live using an online telescope; and the launch of your star name into space!

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Going to the Planets with Your Eyes and Imagination

2008-09-28T03:42:00.000-07:00

by Jeff Seward

A good way to teach your kids their first lesson about the eight or nine (depending on how you wish to tell them about Pluto) planets of the solar system is by combining factual lessons with visible sightings of the planets.

How to Teach Your Kids about Planets

START BY DISTINGUISHING PLANETS FROM STARS; this will also help them understand better why planets are easier to identify among the thousands of stars in the sky if they know what they're looking for. This may also be a good time to start explaining to them why Pluto, once known as the 9th planet in the solar system, has been demoted to becoming a dwarf star.

YOU CAN MAKE LESSONS MORE INTERESTING by providing explanations behind the stories of the planets' names. This makes a great segue from astronomy to Greek and Roman mythology.

IT IS IMPOSSIBLE to see all eight planets in one night so consider dividing your home astronomy lessons into several sessions.

SHOW YOUR KIDS A PHOTO OF OUR EARTH and explain to them why our planet is livable compared to other planets in the solar system. If possible, enumerate the factors that make Earth inhabitable. This is also a good time to explain why scientists believe there's a chance for Mars to have once been inhabited and the theory of aliens.

VENUS is the closest planet to Earth and is the easiest planet to locate with the naked eye because of its brightness. Although the phases of Venus can only be visible through the use of a telescope, you could show photos that will give your kids a good idea about the dangers of the greenhouse effect and emphasize to them the importance of keeping the environment clean.

JUPITER is the next easiest planet to locate with the naked eye because of its size. Make sure, therefore, that you mention to your kids how Jupiter is the largest planet in the solar system. If you have a small telescope with you, you can also point out to them where the Red Spot of the planet is and how it's actually a storm that has been brewing for more than three centuries. This is a good time to explain the differences in Jupiter's and Earth's weather and why we're blessed to have weather like ours.

MARS can be easily located as well because of its distinctive coloring. You can elaborate on what you've discussed earlier on by enumerating the similarities between Mars and Earth.

MERCURY is the closest planet to the Sun, and you can explain why its location or proximity to the center of the solar system makes it difficult to locate at certain times of the day. You can also provide explanations as to why Mercury's weather is extremely hot and cold at day and night respectively before citing the possibility of having the same thing happen to Earth.

ALTHOUGH SATURN IS NOT THE ONLY PLANET IN THE SOLAR SYSTEM WITH RINGS, it is however the most famous. Saturn will appear yellowish to the naked eye but its rings will only be visible with the help of a telescope. If you can show your kids what the rings look like, you can then explain to them what these rings are made of.

URANUS can only be seen by the naked eye if it's shining at its brightest. You will also have to be an optimal place and time. If you're living in a city, you might need the help of a telescope to give your kids a better and clearer view of this planet.

NEPTUNE is the most difficult planet to locate by the naked eye and conditions have to be near perfect first before this can be possible. Together with Uranus, both planets require you to study planetary schedules and locations if you wish to locate them at the shortest amount of time and effort.

And lastly, if you still have time and you do own a telescope, you can also show your kids Pluto. As Pluto is named after the God of the Dead, you might want to cite similarities between the mythical god and its equivalent planet. Explain about the controversy revolving the demotion of Planet.

And there ends your first home astronomy lesson for your kids. Prepare lots of food for the session because this makes a great bonding time for your family as well.

About the Author

Learn about Sun facts and Jupiter facts at the Planet Facts site.

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How To Moon Gaze

2008-09-17T00:37:00.000-07:00

by Jeff Seward

For many of us, our very first experience of learning about the celestial bodies begins when we saw our first full moon in the sky. It is truly a magnificent view even to the naked eye. If the night is clear, you can see amazing detail of the lunar surface just star gazing on in your back yard.

Naturally, as you grow in your love of astronomy, you will find many celestial bodies fascinating. But the moon may always be our first love because is the one far away space object that has the unique distinction of flying close to the earth and upon which man has walked.

Your study of the moon, like anything else, can go from the simple to the very complex. To gaze at the moon with the naked eye, making yourself familiar with the lunar map will help you pick out the seas, craters and other geographic phenomenon that others have already mapped to make your study more enjoyable. Moon maps can be had from any astronomy shop or online and they are well worth the investment.

The best time to view the moon, obviously, is at night when there are few clouds and the weather is accommodating for a long and lasting study. The first quarter yields the greatest detail of study. And don't be fooled but the blotting out of part of the moon when it is not in full moon stage. The phenomenon known as "earthshine" gives you the ability to see the darkened part of the moon with some detail as well, even if the moon is only at quarter or half display.

To kick it up a notch, a good pair of binoculars can do wonders for the detail you will see on the lunar surface. For best results, get a good wide field in the binocular settings so you can take in the lunar landscape in all its beauty. And because it is almost impossible to hold the binoculars still for the length of time you will want to gaze at this magnificent body in space, you may want to add to your equipment arsenal a good tripod that you can affix the binoculars to so you can study the moon in comfort and with a stable viewing platform.

Of course, to take your moon worship to the ultimate, stepping your equipment up to a good starter telescope will give you the most stunning detail of the lunar surface. With each of these upgrades your knowledge and the depth and scope of what you will be able to see will improve geometrically. For many amateur astronomers, we sometimes cannot get enough of what we can see on this our closest space object.

To take it to a natural next level, you may want to take advantage of partnerships with other astronomers or by visiting one of the truly great telescopes that have been set up by professionals who have invested in better techniques for eliminating atmospheric interference to see the moon even better. The internet can give you access to the Hubble and many of the huge telescopes that are pointed at the moon all the time. Further, many astronomy clubs are working on ways to combine multiple telescopes, carefully synchronized with computers for the best view of the lunar landscape.

Becoming part of the society of devoted amateur astronomers will give you access to these organized efforts to reach new levels in our ability to study the Earth's moon. And it will give you peers and friends who share your passion for astronomy and who can share their experience and areas of expertise as you seek to find where you might look next in the huge night sky, at the moon and beyond it in your quest for knowledge about the seemingly endless universe above us.

About the Author

To learn facts about Earth and facts about Saturn, visit the Planet Facts website.

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How To Use a Telescope - Comprehensive Telescope Kits

2008-08-23T03:43:00.000-07:00

by John B. Mayall

For the budding stargazer, the most important instrument in his inventory should be a telescope. Once this debate is resolved, the next question is where to source this all important instrument from. You can work from scratch, buy all the raw material required, and build your own telescope, or you can take the easier and more practical way out and buy yourself a telescope kit which contains every last thing you will need to make you telescope and then just assemble the supplies together. It is the telescope kit that is the recommended option for a beginner. Ideally, only professional should attempt to build a telescope out of practically nothing. Telescope kits not only come with everything you need to build a good telescope, they also contain a descriptive instruction manual that will lead you through each step of the telescope construction process.

The commonly available kits have the elements and the guides for making a Dobsonian telescope. This telescope uses a secondary mirror in addition to a primary mirror. The other optical constituents of this telescope are a finder scope, an eye piece, a focuser, and the mirror support system. The housing compartment for all these elements is not included as part of the kit.

Using such kits to construct your own telescope is graced with numerous advantages. Most of these advantageous highlights are meant for beginners, who can save both time and money with this option. A complete kit allows the builder to save the time that would otherwise be spent searching high and low for the correct components. The average price of a telescope kit is $200 to $300. They can be purchased at hobby centers everywhere, and if you find a discount, the better bargains you will get.

For teachers who need a demonstration to incite the interest of youngsters and get them hooked onto an interesting hobby such as this, telescope kits are a good teaching aid. It is possible to use such a kit for classes in school and demonstrate the whole process to the students. There is no age restriction for this hobby, making it a good hobby for anyone interested in it.

Telescope kits generally are aimed at beginners, amateurs just starting out on their telescope love affair, or at students of the astronomy who intend to pursue a profession in the field someday. To build a telescope using such a kit, you do not need a degree in astronomy or even the experience of an expert. Absolutely any novice is capable of constructing a decent instrument with the instructions given. Manuals that come with the kits, are step-by-step guides, and even have diagrams that explain the methods detailed. Affordably price, and attractively marketed, these kits can pack a pretty powerful telescope and are a lure for any beginner.

It takes only 2-3 days to have an operational, fully functional telescope in your hands after you get your kit. The total work-hours required for it are hardly 15 or 20 from your time. You can work for an hour a day or work a marathon stretch over two days to complete your project. A lazy weekend is the best time to get started. There is never the complication that arises from missing a crucial element during purchase, because these kits always have everything. If you find something damaged, you can have it replaced at the store you bought the kit from. However, it is best to run through the content of the kit and check for quality at the time you make the purchase.

About the Author

Uncover more interesting facts about telescopes as well as getting free hubble space telescope pictures when you visit http://www.howdotelescopeswork.com, the free portal dedicated to telescope making and usage.

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How to Explore the Night Sky Without a Telescope

2008-08-23T02:28:00.000-07:00

by Will Kalif

You don't need a telescope to see a lot of wonderful things in the night sky. For example five of the planets are often readily visible with the naked eye. There are lots of amazing things you can see and this guide will help you find them.

To maximize what you can see in the night sky there are a few things you should do as preparation. Of course the first thing you need is a clear and cloudless night. And this includes the moon. You should try to do your observing on a night with no moon; or at the least the smallest sliver of moon possible. Its brightness will wash out many of the dimmest and most dramatic objects in the sky. Second you should consider your comfort. Make sure you dress appropriately for the weather and bring extra layers of clothing if you are observing during cold months. The temperature late in the evening can be substantially lower than it is during the day and because observing the sky means not moving around much you will be even colder. Bring along any items to help your comfort like a lawn chair or a reclining lawn chair so you can look up without craning your neck.

Find yourself a spot to observe from that is as dark as possible. This means get away from street lights, city lights, house lights, or any other type of light source. Ideally you should drive away from any city that is nearby. If this is not possible then try to find the darkest spot you can. Man-made Light sources have an effect on the night sky by washing out the dimmer objects and they have an effect on your eyes by causing your pupils to close. This will decrease your ability to see the dimmer objects.

Beginning your observing is the most critical time for one big reason and this is why a lot of people don't realize how rich the night sky really is. It takes your eyes up to a half an hour to fully adjust to the darkness outside. If you go outside and immediately begin looking for object in the sky you may be disappointed but this is because your eyes haven't adjusted yet! Give it some time and let your eyes fully adjust and you will be amazed at how many more things you see in just a half hour time.

Equipment and stuff to bring along

Get some star maps, planet charts, and reference materials and bring them right outside with you. They will help you to find various objects. But it will be dark outside so you won't be able to read them! And if you turn on some kind of a light or flashlight your night vision will be ruined. But there is a way to read your charts and materials without ruining your night vision. Cover your flashlight with some type of red cellophane or tape so it only gives off a dim red glow. The reduction in light will have less of an effect on your viewing and your eyes are very insensitive to red light so your pupils will not dilate. You can buy flashlights with red covers online, at astronomy and optical shops, or even at military surplus stores.

Suggested Materials List: * Lawn Chair or Reclining Chair * Constellation Chart * Planetary Chart * Lunar Chart * Plenty of Warm clothing * Flashlight covered with red cellophane * Snacks and hot beverages

Things to See

The first place you can start with is the moon (If it is out). And the best viewing will be when it is only a think crescent. This is because when it is like this the sun is casting light on it at a very sharp angle and the surface features will cast long shadows which makes them easier to see. With a full or near full moon the light hits the surface of the moon directly and casts no shadows.

The Milky Way Galaxy - Our solar system is part of a tremendous spiral galaxy called the Milky Way galaxy. You can see this galaxy as a band of diffuse light that stretches across the sky. It takes dark skies and well adjusted night vision to see it but it is quite a remarkable sight. Every star and constellation map will show you where the milky way stretches across the sky.

The Constellations - Finding and identifying various constellations can be a lot of fun. Each constellation represents an object, animal, or historic figure; and learning the story behind them can also be a lot of fun. Identifying constellations is also the only way to go deeper and find other objects like planets and comets. They form the background that everything moves within and they give you a frame of reference for finding these objects. Identifying constellations should be part of every star gazing event you undertake.

The Planets - The planets move around in the sky quite a bit and sometimes they are too close to the position of the sun which means they are not visible at night but five of the planets, when in the right position are easily visible with the naked eye. These are Mercury, Venus, Mars, Jupiter and Saturn. And often times these planets are the brightest objects in the sky. Refer to you planet charts to find current locations of them. One rule of thumb for figuring out whether something is a star or a planet is whether or not it twinkles. Stars twinkle and planets do not. So if you locate an object that you believe is a planet you can watch it for several minutes to see if it twinkles like other stars. If it does not then chances are good you have found a planet.

Colorful Stars - Stars are not all white. This is a common misunderstanding that people have. Stars come in a wide variety of brilliant colors and some of the more notable ones are the bright red Betelgeuse in Orion, the bright light-blue Rigel in Orion, the yellowish-white Altair in Aquila, and the bright red Antares in Scorpio. Finding and identifying these colorful stars can be a lot of fun. It can also be quite easy because some of the brightest stars in the sky are also very colorful from white to blue and red.

Some Objects of Particular Note

There are two very unique objects that are very easily seen with the naked eye on a dark night in the northern hemisphere. These are the Andromeda galaxy and the Hercules Nebula. They appear as tiny wisps of white smoke that look like small cotton balls. Once you start getting familiar with the constellations you should look for these two objects. The Andromeda galaxy is in the constellation Andromeda and the Hercules nebula is in the constellation Hercules.

Periodic and Occasional Objects

The night sky is filled with a lot of objects that come and go in different patterns. Some of them, like meteor showers, occur at around the same time every year. This is when the Earth passes through clouds of space debris. You can check a chart of meteor showers and plan an evening or several evening of watching them. Some meteor showers can give as many as 120 falling stars every hour.

Comets - These can be difficult to view because they are often very dim. But occasionally a comet will become very bright and be easily visible with the naked eye.

The night sky is more than just the moon and the stars. It is a extraordinarily rich environment with objects of all kinds. And given a little bit of time and dark skies you will discover and explore many of the beautiful secrets that it holds; and you can do it without a telescope. All you need is dark skies, a few charts, and a little bit of time.

About the Author

Learn More about the wonders of the night sky at the authors website: TelescopeNerd.com

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How Do Telescopes Work - Amateur's guide to Telescope-making

2008-07-30T03:31:00.000-07:00

by John B. Mayall

When Galileo made his telescope, he was far from the expert he became later. He was just a layman, who found the sky and its stars fascinating and wanted a device that would take him closer to the object of his fascination. It was this desire that led him o devise the first ever telescope that changed the face of history in more ways than we can imagine.

In today's age, a person is able to buy a telescope, readymade, from the market. But for one who is not experienced, constructing a telescope is akin to an adventure. Although the procedure is complex and technical, and quite long, it is quite possible to make a telescope for oneself, by oneself. For the amateur who holds a keen interest in the telescope and the way it works, constructing it by oneself can be quite adventurous and fulfilling.

The construction itself is not very difficult, and it is made easier if one can enlist the assistance of another person who has himself constructed telescopes earlier. Even someone who is an amateur astronomer would make a good mentor, if it's no possible to find one experience in telescope construction. Astronomy clubs generally have at least one member who has prior experience of building telescopes, and such people are quite accommodating towards amateurs.

For an amateur, telescope construction can be a cumbersome task. Patience and calm are advisable for a first-timer. The greatest inventions of all time came from blind experiments and unexpected results. When starting out, it is always best to have some references and manuals handy, as they can explain the technical aspects in the clearest ways. A local library is a good source for material to an amateur just starting out in telescope building.

The basic elements of a telescope are the mirror, two lenses, the housing for the whole structure, and materials that will be used for polishing the mirror. These parts can all be bought at local stores or even online. The mirror can be ground at home as well, but is a tiresome process.

The construction of a telescope is a long and drawn out process. Careful planning is required to ensure that there is minimal cleaning up left after all the work is completed. Is advisable to lay out newspapers to ensure clean work as well as to ensure correct placement of all the equipment. Maintain a logbook if possible to keep track of the task completed and the duration of each task. In later stages, the logbook is a good record to refer to understand the tasks completed and how long each task required. Also, it helps one to remember what work has been completed and what remains.

Once the construction is complete, it is quite natural for the amateur to be pleased with himself for the work he has accomplished. It is however, easier to buy a telescope kit from the market instead of purchasing individual component and constructing the whole structure. Assembling a telescope from a kit is easier, takes less time and is a better financial option. Such telescope kits are intended for the amateurs, and not directed at the professionals.

About the Author

Get free lessons on how to build a telescope as well as professional advice on how to buy a telescope when you visit http://www.howdotelescopeswork.com, the premier portal on how to use telescopes.

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Choose a Good Beginners Telescope - Cut Through the Information Overload

2008-07-18T22:34:00.000-07:00

by Aidan James

So you've been bitten by the astronomy bug and want to get started with your very own telescope, but you're confused by the vast number of possible purchases? You are not alone, astronomy stores are accustomed to dealing with the confused beginner though of course not everybody has the opportunity to visit a specialist store. This article is intended to help cut through some of the confusion.

It's important to choose a telescope that is right for you, for example there is no point having a great big Dobsonian if you rarely get the chance to assemble it in a good dark sky location.

There are several factors to be considered from practical considerations like size, weight and portability to the price you can afford and indeed where you'll be doing the majority of your observing. Ignoring more advanced uses like astrophotography we might think along the following lines.

As a general rule, the larger the aperture the more you can expect out of your telescope. Refractors will generally outperform similar size reflectors. Refractors however are more expensive than reflectors, due to the extra high quality glass involved. They can also be impractical to handle at larger apertures where they can also reach very long tube lengths.

Large aperture reflectors can have comparatively short tubes and be very easy to handle as well as inexpensive. There is a little extra maintenance involved as you may need to clean and align the mirror from time to time, this procedure is known as collimation.

Catadioptric telescopes are a combination of refractor and reflector and are quite portable even at large apertures. A great many amateur astronomers who have access to good dark sky sites, ultimately end up with catadioptric telescopes because the offer a range of possibilities including astrophotography. The large ones, like most large aperture scopes, are not ideal in light polluted areas like the city and suburbs.

Those big Dobsonian telescopes are really just big reflectors mounted on simple turntables and their attraction is their huge light capture and simplicity of use, making them ideal for visual astronomy in a good location (again they are not so good in light polluted areas).

If you do not relish the thought of learning to find your way around the skies you could consider purchasing one of the models that come with a computerized mount. These 'Go-To' telescopes have made finding targets a breeze.

With those facts in mind you can now think about where you are going to do the most observing and choose a suitable beginners telescope. If you live in the city and are unlikely to get to a rural location for observing then perhaps stick with the small to medium size refractors, reflectors or catadioptrics, with or without the go-to function, your budget will probably start to dictate the choices here! If on the other hand you live in a dark sky area then my recommendation is to buy a great big Dobsonian. These offer so much viewing pleasure and are so simple to use it is difficult to fault them.

About the Author

See my Squidoo page for more on how to choose a good beginners telescope and some specific recommendations and absolute bargains! Telescopes for Beginners, a site helping others get a start in astronomy. Telescopes for Beginners

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Binoculars For Astronomy - Know the Basics

2008-07-14T18:59:00.000-07:00

by Aidan James

If you like to look to the heavens even just occasionally get yourself some decent binoculars and indulge in a little binocular astronomy. Think about it, binoculars are inexpensive, highly portable and require no complicated setting up procedure so are ideal for casual astronomy.

Binoculars allow excellent moon views, and great viewing of star fields, comets and even deep sky objects. They are especially useful for beginners as unlike astronomy telescopes they keep the view the the right way up, making it really easy to navigate the skies. With a little practice you can pick out several of the planets and even the larger moons orbiting Jupiter. Clusters like Pleiades look great because the binoculars wide field of view lets you have more of the cluster in view at one time than a telescope would.

So how to choose which ones? Binoculars have two specifications marked on the body of the binocular in the form of 7x 50, where the first number represents the magnification (in this case 7 times) and the second the aperture in millimeters (50mm in this case). When it comes to selecting the right binoculars for astronomy, aperture is the most important feature to think about. The bigger the aperture the more light is captured so the brighter and clearer the image will be. For astronomy use you will need at least 40mm aperture and preferably larger.

You will need a magnification factor of at least 7, maybe up to 10 if you have a steady hand. Any higher than about 10 times magnification and you will need to mount your binoculars on a tripod as the hand shake effect makes it difficult to get a sharp image.

There are giant binoculars available with higher magnifications and apertures which are designed for astronomy use but you will certainly need a sturdy tripod or mount to use them. These can offer excellent viewing up to about 25 times magnification with 100mm apertures.

This brings us to another point, a specification known as the 'exit pupil'. This specification refers to the diameter of the shaft of light that exits the eyepieces and into your eyes. You can easily calculate it by dividing the aperture by the magnification so that 7 x 50 binocular has an exit pupil of just over 7mm. Capturing as much of that as possible is good as it means all the available light is getting to where you want it, i.e.your eye. If you are still in your twenties you can probably use all of that 7mm exit pupil mentioned above as your pupils will dilate to about that size in very dark conditions, however as you get older your pupil does not dilate more than about 4 to 5 mm so large exit pupils are wasted (though it starts to make those 25x 100's look good!).

You might notice another specification marked on the binocular, the field of view (FOV), it refers to the apparent side to side view as you look through the binoculars. It will be expressed as an angle in degrees or a measure such as 340 feet at 1000 yards. For astronomy use we can generally ignore that factor, it really does not matter a great deal at the distances we'll be viewing at.

So now you have the basics why not get yourself some binoculars and indulge in a little casual astronomy, you'll be rewarded with some wonderful sights!

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