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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.
... The other is Jupiter's moon Europa, which may have a vast ocean deep below its surface. Copyright 2006 by Pearson Education, Inc. publishing as Pearson Prentice Hall. All rights reserved. Privacy ...
http://www.phschool.com/s ...ve06/astr1042906.html
... object in the Solar System; Europa is covered by an ocean of ... smaller outer satellites of Jupiter probably are captured ... from the asteroid belt, the Moon, and Mars has provided further ...
http://www.yale.edu/ynhti ...996/6/96.06.03.x.html
Learn about the Moon with this eBook and predict Moon phases and more with the associated astronomy/astrology software package.
http://thx1142.nsocat.hop.clickbank.net" target="_top
... gov/ice 12-17-99 SAN FRANCISCO (Reuters) - Scientists looking for possible alien life are focusing on Jupiter`s moon Europa, where huge cracks in the surface indicate that a massive liquid ocean may ...
http://www.rense.com/ufo5/io.htm
... Weekly Planetary Radio Trivia Contest Space Topics: Jupiter Europa Click to enlarge > Jupiter's Moon Europa Europa's youthful surface is covered with pinkish grooves and cracks. Credit: NASA/JPL ...
http://www.planetary.org/ ...m/jupiter/europa.html
News about the Penn State Eberly College of Science "Jupiter's Moon Europa and the Rebirth of Exobiology" on 26 February is Sixth Lecture in Saturday Series on "Astrobiology: Looking for Life in the ...
http://www.science.psu.ed ...ntiers26Feb-2000.html
... Finding Himalia, the fifth brightest moon of Jupiter by Rick Scott October 20, 2003 Abstract Himalia is the only moon other than Europa, Ganymeade, Callisto and IO visible ...
http://www.astronomy.net/articles/18/
... March March 1 - Attack Submarine USS-Sea Devil (now Devil (SSN-664)) starts to be deactivated March 2 - Data sent from the Galileo probe indicates that Jupiter 's moon Europa has a liquid ocean under ...
http://www.freeglossary.com/1998
... Space Telescope ISDC 2006 Jupiter Mars Mars Exploration Rovers ... Space Telescope Stardust The Moon Trans-Neptunian Objects ... Radio Trivia Contest Projects Europa Mission Campaign More On This ...
http://planetary.org/prog ...jects/explore_europa/
... s Moons Deimos Mars' Moons Dione Saturn's Moons, Saturn's Moons Earth's Moon Earth's Moon Europa Jupiter's Moons Ganymede Jupiter's Moons Io Jupiter's Moons Mimas Saturn's Moons, Saturn's Moons ...
http://www.dustbunny.com/afk/siteindex.html
... provides the best example on Earth for the conditions believed to exist on the surface of Jupiter's moon Europa. Ice-covered Europa is considered one of the best candidates for finding evidence of life ...
http://asia.spaceref.com/ ...viewpr.html?pid=20074
... NASAÃs Galileo probe photographed the icy crust of JupiterÃs moon Europa, revealing cracks that may indicate an ocean of liquid water beneath. Another probe recently found evidence of tons of frozen ...
http://www.bottledwaterst ...om/waterfacts2000.htm
[an error occurred while processing this directive] Pictures of the moon Europa Jupiter Home | Io | More Io | Even More Io | Callisto | Europa | Ganymede | Moons Compared | Smaller Moons | Solar ...
http://www.the-planet-jup .../europa-pictures.html
... Galileo's mission was extended two years to study Jupiter's moon Europa in depth (the Galileo Europa Mission). The mission has been extended a to a third segment called the Galileo Millennium Mission ...
http://astrogeology.usgs.gov/Missions/Galileo/
... geology "Formations on Jupiter's Moon Europa" 14. MetaResearch.org MessageBoard "A 4th Planetary Explosion Mechanism" 15. MetaResearch.org MessageBoard "Eph, CDC, Sosah Melting Pot" 16. MetaResearch ...
http://nodrift.com/
... 02.3 Is there life on Jupiter's moon Europa? [1996-09-03] 02.4 Is there life on Saturn's moon Titan? [1997-08-05] F.03 What is the Drake equation? [1995-10-04] F.04 What is the Fermi paradox? [1995-12 ...
... Jupiter's Moon Europa Statistics, animations and annotated pictures. Indian Moons, Days & Other Calendar Stuff A list of many American Indian tribe's names for months, days, and other calendar ...
http://www.heathq.com/heatmoon/
... POP MIX, LOW ENERGY SPECIAL HOUSE REMIX, AND SPECIAL PIANO LEAD FROM 61 VERSION MIX, EUROPA (JUPITER MOON), AND BUMBLEOVA - 60'S BONUS CUT. #ST1003 - 29.00 USD Bumble Boogie (paper Roses) - 7 ...
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... Jupiter's rotation." Life under the ice? Callisto is the second moon of Jupiter thought to harbor a sub-surface ocean. The other is Europa. As evidence mounts for at least one and possibly two liquid ...
http://science.nasa.gov/n ...ines/ast22oct98_2.htm
jupiter moon europa Search Results for jupiter moon europa Jupiter News Articles The ice shell of Europa, a moon of Jupiter, is probably about 25 kilometres (15 miles) thick, according to scientists ...
http://www.phoenixdawn.nl/1107/
By day, you're a researcher on Jupiter's moon Europa. In your free time you re-program the rovers to race around the hallways, battle it out with mini lasers and rocket launchers, and find their way ...
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ARTHUR ZULU, The Most Controversial Writer in the World, is the author of the best - selling book, HOW TO WRITE A BEST-SELLER.
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Title: ARE SPACE ALIENS COMING TO DESTROY US?
Author: Arthur Zulu
Contact Author: mailto: controversialwriter@yahoo.com
Copyright: Copyright © Arthur Zulu 2002
Word Count: 504
Web Address: http://www.1stbooks.com/bookview/10975
Publishing Guidelines: Permission is granted to publish this article electronically or in print as long as the bylines are included. A courtesy copy of your publication would be appreciated.
ARE SPACE ALIENS COMING TO DESTROY US?
By Arthur Zulu
The cinema hall was packed full. The audience cheered and laughed at the show. Well, for one thing, it was fiction for
they know that such thing is impossible in real life. After all,
here they are, seated without any invading men from space.
But wait a minute. Space invaders? Yes, call them ET's, little green men, or any other name. That cinema show may be for real. Because some people believe that one fateful day, extraterrestrials will seize the earth.
Come to think of it. In the history of civilization when has the nations not been at each other's throat? From the ancient to modern times. And with sophisticated weapons. In the end, some nations have been wiped out, while others have emerged. Show me Babylon. Show me Carthage. Or show me Songhai.
So what makes you think that some blood-thirsty space men are not desperately searching for us. To make prisoners. Keep as pets. Or destroy!
That is a chilling thing. As chilling as the crusades. Or the Jihads. Or the world wars. Or the war against the terrorists.
Now, just in case you think that the earth is the only place
where living creatures are playing around, you had better think twice. For there could be life out there in Mars.
Or Europa, Jupiter's moon. Or elsewhere for that matter.
Why shouldn't there be? The Milky Way alone has about 100 billion stars. Imagine that number. How can anyone think that the only lucky number is earth. Could there not be more winning tickets? Perhaps one?
And suppose we work on the ratio of one earth for one Galaxy. What about the other 100 billion galaxies in the universe? Could there not be at least ten more earths?
Well, that's a reasonable assumption. Unless you are selfish. And don't forget that we are working on the 1% of observable universe. There could be billions of universes with their billions and billions of stars!
Now, we are used to water and light as favorable conditions to life on earth. And on this basis we think that no life can exist outside these conditions. Because perhaps water has not been found elsewhere, and the harsh space may be inhospitable to life.
But we forget that the air we breathe is not the same as what plants inhale. Also we live on land, while the fish live
in water, as the birds fly in the air. Yet we are all living things.
Now, suppose those conditions not favorable for us are the very ones that favor ET's out there in Alpha Centuari or some damned star. Suppose they are even so advanced that they can tame the stars and planets for habitation just as we can tame the earth. Suppose they have advanced beyond nuclear physics and do not need rockets to travel? Or suppose they are this moment combing the multi-universes looking for us? Or suppose they have even come without our knowing it, and are preparing to come and melt the earth?
Well, space watching has always been an interesting past time. Man has been watching the stars and the birds. Until now.
Doomsayers have now added to the list-- space invaders. A lot of time and money has already gone into this space-watching business. They are optimistic that ET's would
come someday. Some are swearing that they have even seen the advance party of these invaders.
So you may have a chance of seeing one, or of getting a signal, if you have a telescope and plenty of time. Otherwise, you could ignore the whole thing and get about your business.
But when suddenly you see that the sun could not give its light, because it has been covered by a space ship twice its size, (just in case they decide to check us out with their baby ship), know that the final hour has come!
Copyright © 2002, all rights reserved
About the Author:
ARTHUR ZULU, The Most Controversial Writer in the World, is the author of the best - selling book,
HOW TO WRITE A BEST-SELLER. Download your copy and FREE excerpt at :
http://
www.1stbooks.com/bookview/10975.
For FREE writing helps, mailto : controversialwriter@yahoo.com
About the Author
ARTHUR ZULU, The Most Controversial Writer in the World, is the author of the best - selling book,
HOW TO WRITE A BEST-SELLER.
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http://www.aaarticles.com/article.php?id=18226
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