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Ccd Astronomy
An astronomy telescope is a scope that allows individuals to see the planets and stars in greater clarity than they can see them with the naked eye. It is not only fun to do, but it can be an activity that both adults and children can share in interest and enjoyment. But, how do you know which telescope to buy? There are so many different kinds, sizes, magnifications, and prices that it can be very intimidating to purchase your first astronomy telescope without some information and education first. Here are some basic guidelines that you can follow when making your choice:
Reflective, Refractive, or Compound? These terms refer to the types of lenses and the way that the images are collected. A reflective scope uses mirrors to collect light and focus the images while a refractive uses curved glass lenses, and the compound astronomy telescope uses a combination of the two.
The cost of a reflective telescope makes it an attractive choice. Mirrors are inexpensive and easy to replace. It is also good for deep space viewing. The disadvantage is that it the mirrors sometimes do not provide the clarity of the refractive scope and sometimes the mirrors are jostled loose.
The refractive astronomy telescope is good for viewing planets and stars. It has very clear images and is easy to maintain. The cost is the main prohibitive factor to most beginning astronomers.
The compound telescope is also on the pricier end of the astronomy telescope family. It is used most often by serious astronomers and those who make a career of astronomy because of the clarity of images and the ability to see images in deep space. This is probably not the best choice for novice star-watchers.
One of the main considerations that you should think about when you are purchasing an astronomy telescope is the aperture. This is a measurement of the ability of the telescope to let light in and also the ability to focus that light. This is a more important measure of the telescope?s abilities than the magnification. The bigger the aperture, the better the telescope will be.
Another important consideration is mounting and portability. If you are going to be moving your astronomy telescope from place to place or taking hiking or camping, you will want a smaller scope with an easy to manage mount. The alt-azimuth mount allows the astronomy telescope to move up and down vertically and side to side horizontally from a central axis-this is perfect for beginners. A more advanced astronomy telescope user might like an equatorial mount which not only allows vertical and horizontal movement, but also sliding from side to side on a perpendicular mount to follow the movement of stars and planets.
As you research your choices you will find a lot more information which can be helpful in deciding the best telescope for you and your family.
... Astrophysics Aztec Astronomy Bad Astronomy Basic Astronomy Biblical Astronomy Binoculars Astronomy Blue Moon Ccd Astronomy Egyptian Astronomy Free Astronomy Software Full Moon Greek Astronomy Harvest ...
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... Inside the WYAS website we hope to include articles written by our members on many topics, from constructing a telescope to techniques related to CCD astronomy. We also hope to include many images ...
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Learn about the Moon with this eBook and predict Moon phases and more with the associated astronomy/astrology software package.
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Gary Nugent has spent more years than he cares to remember pursuing astronomy as a hobby. He runs a number of astronomy based based sites: Night Sky Observer: http://www.nightskyobserver.com The Moon This Month: http://www.nightskyobserver.com/The-Moon-Th
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Like a lot of kids, my folks gave me a 60mm telescope for Christmas one year. The scope was a typical department-store brand - not very good - but to a 12-year old kid it opened up the universe.
Through it I got to see the moons of Jupiter, the phases of Venus and the rings of Saturn. But above all these eye-openers, there was the moon. There in the eyepiece stood craggy mountains - spires casting long shadows across crater lowlands, dark maria and (painfully) bright highlands, a surface pockmarked with craters of all sizes, some with bright ejecta rays and some funny squiggle type features. I soon learned that the greatest amount of detail was seen along the terminator, that line splitting light from dark, where shadows played across features showing them in stark contrast. And to cap it all, each night different features could be seen in detail.
They say that as you get older, your memory plays tricks on you - you remember good things more than the bad. I remember lots of clear, frosty winter nights when I could point my 'scope at the moon and scan its disk for some feature I had not seen in relief before. These days, the skies seem to be cloudy much more frequently and the frosty winter nights are few and far between. I guess that's global warming for you!
Time moved on and I moved in and out of committee positions in astronomy societies, editing some magazines along the way (I now put my own ezine, called Photon - http://www.photonezine.com), together every couple of months). Astronomy became more about the bureaucracy of running clubs than about looking through a telescope. Then, in the late '90s, wanting to get back to my astronomical roots, I bought a 'real' telescope, an 8 reflector which I readily turned towards the moon. Stunning views once again assailed my eyes (prompting memories of halcyon nights as a 12 year old looking through my old 60mm scope).
I'm a software writer (or should that be engineer?) by profession, so I wrote a bit of software which would help me in planning my moon observations. It told me when the moon would rise and set, what phase it was and other stuff. When people who'd seen it said they wanted a copy, I polished it up and released it as Shareware under the title LunarPhase (http://www.nightskyobserver.com/LunarPhase). It's now evolved into a more comprehensive application called LunarPhase Pro (http://www.nightskyobserver.com/LunarPhaseCD). I'm pleased that's it's been receiving very good reviews - I feel like I've done something to make other people more aware of my old friend in the sky.
With the encroachment of light pollution across the globe, the pristine skies of my youth have been gradually fading behind the yellow-orange glow of ever more street lamps. Where stars once twinkled on a velvet background, only a few hardy garnets of light now poke through the misty haze and background neon glow. But the Moon is always there, outshining any murk and pollution we cough up into the sky.
It's a shame we don't treat the sky with the same respect we give our national parks. After all, the sky belongs to all of us. How many of us really appreciate people throwing garbage into our back yards or littering our parks. Why should we allow others to pollute our natural resources?
These days, I'm getting into lunar photography with digital cameras and more sophisticated CCD cameras. I've posted a few of my images on my website if you'd like to see them. I still find a night under the stars with a partially lit Moon high in the sky a relaxing and humbling pursuit. The Moon is the only object in the solar system where we can see real surface detail. I'm so passionate about it that I also wrote an ebook called Observing the Moon (http://www.nightskyobserver.com/Observing-The-Moon-eBook.htm).
Growing up during the Apollo era, I have to say that those missions played a great part in spurring on my interest in the moon. My interest is alive and well and extending in other directions (more on that another time). I hope yours is too.
Onward and upward, as they say!
About the AuthorGary Nugent has spent more years than he cares to remember pursuing astronomy as a hobby. He runs a number of astronomy based based sites: Night Sky Observer: http://www.nightskyobserver.com The Moon This Month: http://www.nightskyobserver.com/The-Moon-This-Month.htm LunarPhase Pro: http://www.lunarphasepro.com Photon Astronomy Ezine: http://www.photonezine.com
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http://www.aaarticles.com/article.php?id=18105
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