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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.

1. Astrobiology Journal Club - Life and Planets Astrobiology Center

... Pavlov, Director of Russian Astrobiology Center Apr 14 Jeremiah Murphy: Cassini at Enceladus [Special Issue of Science] Apr 21 Curtis Cooper: The transmission spectrum of Earth-size transiting planets ...
http://nautilus.as.arizona.edu/astrobio.html

2. nsf.gov - News - Astronomers Announce the Most Earth-Like Planet Yet Found O...

http://www.nsf.gov/news/n ...mm.jsp?cntn_id=104243

3. Moon Phase Prediction Software & eBook.

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

4. The Planets

... Size: Four planets in our solar system are larger and four are smaller than Earth Diameter: 7,926.2 miles (12,756 km) Surface: Earth is made up of water (70%), air, and solid ground. It appears to be ...
http://www.factmonster.com/ipka/A0769141.html

5. DISCOVERY ::: MISSIONS ::: KEPLER

... The Kepler Mission is designed to find Earth-size planets in orbit around stars like our Sun outside of the solar system. The scientific goal of the Kepler Mission is to explore the structure and ...
http://discovery.nasa.gov/kepler.html

6. Universe Today - Large Rocky Planet Discovered

http://www.universetoday. ...rge_rocky_planet.html

7. :: NASA Quest > Astrobiology ::

... to detect large extra-solar planets and how photometry is being proposed for detecting Earth-size planets. Ed Prather and Dawn McIntosh were on hand to answer your questions. View the Archive ...
http://www.quest.arc.nasa ...gy/astroventure/2002/

8.

http://www.seds.org/ninep ...planets/overview.html

9. Planets Children's Sleeping Bag - Sleeping Bags

... 98 Size: Toddler Youth (+$35) Pattern: Planets (FSB-PL) Starry Nights (FSB-SN) Planets Children's Sleeping Bag: This stylish sleeping bag is manufactured from 100% cotton prints and 65/35 poly-cotton ...
http://www.netkidswear.com/fplsleepingbag.html

10. BBC NEWS | Science/Nature | Smallest extrasolar planet found

... other Earth-like planets Geoffrey Marcy, UC Berkeley This star also has two larger, Jupiter-size planets orbiting it. The new planet whips around the star in a mere two days, and is so close to the ...
http://news.bbc.co.uk/1/hi/sci/tech/4089534.stm

11. History of the Hallo northern sky planetarium software program

... Secondly for wide fields, the Earth shadow is no longer fixed to minimum plot size planets. 2004-10-3 Recompiled help file with HCRTF 32 bit compiler since images where not very well displayed when ...
http://www.hnsky.org/history.htm

12. Origins Ed. Forum: Missions

... Terrestrial Planet Finder (TPF) TPF will find Earth-size planets orbiting other stars and measure their properties. By studying the atmospheres of these planets, TPF will determine whether other ...
http://origins.stsci.edu/missions.html

13. FHA Homeschooling Page

... Starting with the Solar System, make a mobile using varying sizes of styrofoam balls, big balls for the bigger planets, medium balls for the medium size planets, and so on. Paint each ball according ...
http://www.naturalfamilyhome.com/homeschool.html

14. Quantum AetherDynamics Institute

... Two of the stars ñ 55 Cancri and 47 Ursae Majoris (Target Stars 2 and 4) ñ have Jupiter-size planets orbiting them and may have Earth-sized planets in their solar systems. It will be interesting to ...
http://www.quantumaetherdynamics.com/letters.html

15. Free Essay Network | Extra Solar Planets

http://www.freeessay.com/essays/182865.html

16. NAI Features Archive

... a size limit on life? The Meaning of Life [7-6-2001] Sitting beneath a dark night sky, looking up at the vast array of stars, what human has not wondered, "Are we alone?" Wandering Mystery Planets [7 ...
http://www.nai.arc.nasa.gov/news_stories/index.cfm

17. altvw102

... the fraction of planets with a large moon, f j is the fraction of solar systems with Jupiter-size planets, and f me is the fraction of planets with a critically low number of extinction events. In ...
http://www.npl.washington.edu/AV/altvw102.html

18. » Space

... This star also has two larger, Jupiter-size planets orbiting it. The new planet whips around the star in a mere two days, and is so close to the stars surface that its temperature probably tops 200 ...
http://www.gizmonews.com/?cat=17

19. Super-Earth Sought and Found :: European Astrobiology Magazine :: Search for...

http://euro.astrobio.net/ ...hread&order=0&thold=0

20. Planets Around Binary Stars

... The solar-like stars 16 Cygni B and 55 Cancri A have been found to have Jupiter-size extrasolar planets orbiting them. So we do have indirect proof, through Doppler spectroscopy methods (Marcy ...
http://imagine.gsfc.nasa. .../answers/980122c.html

21. Chairkickers Music Catalog

... The Winter Blanket CKM005 Rise Up The Black-Eyed Snakes CKM010 Rivulets Rivulets CKM004 The Size of Planets Haley Bonar CKM009 Last Night I Dreamt that Somebody Loved Me Low CKM003 Debridement ...
http://www.chairkickersmusic.com/Catalog.htm

22. extinction cycles late great bombardment ice ages Dark Star

... Regular size planets, or even gas giants, passing through the solar system would no more cause a problem to us than an alignment of the known planets. This is why I maintain that for Nibiru to have ...
http://www.darkstar1.co.uk/extinctions.html

23. Starry Night® Times - April 2006

... Pollution The Sun and the Aurorae Moons and Planets Comets and Meteors Suggested materials (enough ... ... soluble) in a variety of colors Medium and large size craft paint brushes Pencils, pens, markers, oil ...
http://www.starrynight.co ...006/2006-04-full.html

24. French satellite to search for new planets

... search for new planets Technology & Science Story Tools ...
http://www.cbc.ca/technol .../28/corot-launch.html

25. HubbleSite - Full story about "Astronomers Use Innovative Technique to Find ...

... have detected more than 180 extrasolar planets, X0-1b is only the tenth planet discovered ... ... astronomers to determine a planet's mass and size. Astronomers use this information to deduce the ...
http://hubblesite.org/new ...eleases/2006/22/full/

26. ESA Portal - Focus On - Why are things in space the shape that they are?

... The areas can merge, forming larger and larger pieces that eventually grow to the size of planets. If they become large enough, their gravitational field becomes more significant, which encourages ...
http://www.esa.int/esaCP/ ...HD_FeatureWeek_0.html

27. Next Best Thing To A Stairway To The Stars

... ASTRONOMY A Telescope As Big As The Ritz So far, some 130 stars are known to have giant, Neptune-size planets -- and computer models indicate that perhaps half of them might also have Earth-like ...
http://www.businessweek.c ...nt/05_16/c3929116.htm

28. Graduate Dissertations

... It seems that Jupiter-size planets formed by pure runaway growth require more than the typical protoplanetary disk lifetime to collect their mass from the surrounding material. Gas giant planet ...
http://www.astro.indiana. ...d_dissertations.shtml