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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. The Northern Virginia Astronomy Club (NOVAC)

Home About NOVAC Join NOVAC FAQ What's New Meetings Observing Sites Public Viewing Robotic ...
http://www.novac.com/

2. EMU Astronomy Club

Eastern Michigan University ASTRONOMY CLUB Founded in 1977 as an EMU student organization devoted ... ... Officers / Members / Alumni Meetings and Events Equipment Astronomy Club News! Radio Telescope Fish ...
http://www.physics.emich.edu/astrclub/index.htm

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. Astronomy Club of Akron

The Astronomy Club of Akron Your browser does not support inline frames or is currently configured ... ... frames. About The Club Welcome to the Astronomy Club of Akron (ACA) webpage. The ACA has been a ...
http://www.acaoh.org/

5. AstroLeb homepage, introduction -AstroLeb (astronomy in lebanon astronomy le...

ASTRONOMY IN LEBANON ASTRONOMY LINKS ASTRONOMY NEWS THE SKY NOW ABOUT US PLEASE WELCOME A NEW ASTROLEB MEMBER: MONA SUKKARIEH ... We go out our daily lives understanding almost nothing of the world ...
http://www.astroleb.com/

6. Pontchartrain Astronomy Society

... THE PONTCHARTRAIN ASTRONOMY SOCIETY (PAS) was founded in 1959 and currently has a roster of nearly ... ... Our members come from many walks of life and have diverse interests in amateur astronomy. The goal ...
http://www.pasnola.org/

7. Sunridge Observatory - Medicine Hat Astronomy Club

The home of the Medicine Hat Astronomy Club The Sunridge Observatory is a non-profit organization. We operate as any non-profit organization through donations and grants. We are open to visitors and ...
http://nonprofit.memlane.com/astro/

8. Physics and Astronomy Club at SFSU

... that in order to make the club fly, we needed a club house and could be please have TH 115 and he ... ... as well as items of interest in the Physics & Astronomy (P&A) Department and the greater communities ...
http://www.physics.sfsu.edu/~pac/

9. HSU Astronomy Club Home Page

ForumArticlesPhoto GalleryCalendar The information on this page represents that of the HSU Astronomy Club and not necessarily that of Humboldt State University. The HSU Astronomy Club takes full ...
http://www.humboldt.edu/~hsuastro/

10. Decatur Area Astronomy Club - Home Page

... The members of the Decatur Area Astronomy Club would like to welcome you to our website. Please ... ... Decatur Area Astronomy Club encourages and supports the beginning and advanced amateur astronomer ...
http://www.decaturastronomy.com/

11. Welcome to New Mexico Tech Astronomy Club Website!!!

Astronomy Club 2005© New Mexico Tech if you do not have flash click here to go to the home page or click here to download flash
http://infohost.nmt.edu/~astro/

12. Sunshine Coast Astronomy Club

Sunshine Coast Astronomy Club - British Columbia's newest and most exciting gathering of ... ... Welcome to the Sunshine Coast Astronomy Club Website Next Event(s) Friday October 28th - General ...
http://www.sunshinecoastastronomy.com/

13. VTC Astronomy Club Home Page

VTC Astronomy Club We are the Vermont Technical College Astronomy Club. The club was founded during the summer of 1998 by Jason Lewis, Peter Chapin, and Fred Woodworth. Our goals are to expose club ...
http://web.vtc.edu/clubs/astro/

14. Welcome to the Yampa Valley Astronomy Club!

Routt County Weather and Climate>Yampa Valley Astronomy Club Welcome to the Yampa Valley Astronomy Club! Welcome to the Yampa Valley Astronomy Club home page. This site is new, and will be updated ...
http://www.yampavalley.org/weather9943271.asp

15. Santa Cruz Astronomy Club

Welcome to the Santa Cruz Astronomy Club The Santa Cruz Astronomy Club serves all communities in Santa Cruz County, California as well as many members from neighboring areas via our Newsletter the ...
http://www.astro.santa-cruz.ca.us/

16. Santa Fe Astronomy Club - HOME PAGE

http://www.sfastronomy.com/

17. Castle Point Astronomy Club

cpac.org.uk Your browser does not support frames. To view our web site click here: http://www.cpac ...
http://www.cpac.org.uk/

18. Rappahannock Astronomy Club

Rappahannock Astronomy Club Welcome to the Rappahannock Astronomy Club's web site. RAC is a non-profit organization of amateur astronomers located in the Fredericksburg, VA area. If you have even a ...
http://www.raclub.org/

19. TCC District Astronomy Club

... District Links Visitors Employees TCCD Information Northeast Campus Northwest Campus South Campus Southeast Campus Downtown Campus Astronomy Club Astronomy Club This club exists to provide students ...
http://www.tccd.edu/neutr ...tPage.asp?pagekey=510

20. Astronomy Club of Asheville

Astronomy Club of Asheville Asheville, N.C. "Land of the Sky!" O Star (the fairest one in sight ... ... Mt. Pisgah, March 1997 (Details-335Kb file) Astronomy Club of Asheville Yahoo E-Group: A forum to ...
http://www.astroasheville.org/

21.

Castle Point Astronomy Club Unfortunately, because this website uses Frames, your browser does not ... ... If you live in South-East Essex and wish to find out more about The Castle Point Astronomy Club ...
http://www.cpac.freeserve.co.uk/

22. The Astronomy Club of IIT Madras

Links Home Magazine Facilities Events Photos from Observation sessions Interesting links Sky and Telescope Heavens Above Visual Deep Sky Astronomy   magazine Welcome to the Astronomy Club of IIT ...
http://www.astro.iitm.ac.in/

23. Stonebelt Stargazers Astronomy club Bedford Indiana

... Johnson - Secretary/Treasurer The Stonebelt Stargazers are a member club of the Astronomical League Stonebelt Stargazers 2001 Astronomy Day Award Web Design - Ron Reuter Current Moon Phase courtesy USNO
http://www.mainbyte.com/stargazers/

24. Antelope Valley Astronomy Club

Viewing this page requires a browser capable of displaying frames. If your browser does not support ...
http://www.avastronomyclub.org/

25. Tel Aviv Univesity Astronomy Club (TAU Astro Club)

Ú·¯È | English Venus Transit homepage ÏÁ ÎÔ Ï¯ ÓÚ·¯ Ï (·Ú·¯È)< The Tel Aviv University Astronomy Club (Astro Club for short) is a voluntary activity of graduate students of the ...
http://www.astroclub.tau.ac.il/index_en.html

26. New Page 1

http://www.tuvaclub.org/

27. Saguaro Astronomy Club - Home Page

... PDF Constitution Meetings Speakers Contacts News Letters SAC FAQ Novice Info List Subscription Club Photo's Member Sites Things To View Awards Pgms. Observations Downloads AstroLinks SkyClocks Best ...
http://www.saguaroastro.org/

28. St. PETERSBURG ASTRONOMY CLUB

... to be viewed using Netscape 2.0's Frame capable browser. A Frame-capable browser can be obtained from Netscape Communications. [ St. PETERSBURG ASTRONOMY CLUB's crippled Home Page} Jan 13, 1996
http://home1.gte.net/hoffmanc/

29. Astronomy News from Digitec Optical

Call Us Toll Free! 1-888-327-5759 10am to 10pm 7 Days! Gallery | Links | Astro News | Policies ...
http://www.digitecoptical.com/astronews.html

30. Timmins Astronomy Club

The Timmins Astronomy Club is a loose collection of amateur astronomers in the Timmins Ontario area ... ... For more information on the Timmins Astronomy Club please contact Al Audet or David Smith. Get the ...
http://www.timminsastronomy.com/

31. NSA - Northwest Suburban Astronomers

... Events Our club throws an annual Astronomy Day, has observing trips, and other events. This is where you find out more about our events. Members Only Member only information like contact lists, club ...
http://www.nsaclub.org/

 



K.A.Cassimally is the editor in chief of Astronomy Journal and Astronomy Journal Ezine. He is also the co-founder of the RCPL Astronomy Club. K.A.Cassimally is best known for his article 'Harry Potter and the Moons of Jupiter'.He is also Senior Columnist
Do you know what happens when a drop of water hits a non-absorbent surface? Yeah you're right (if you don't have the answer, please re-read the title of this column), the drop bounces upwards.

A French scientific team from the College de France have studied the scene carefully with a camera that took 40000 images per second. Here are the results:
At first, when it hits the surface, the drop flattens. Then, it bounces up due to the movement energy it had when falling down. The drop will continue going upwards eventually taking the shape of a needle. Afterwards, the drop falls upon itself, into itself. It thus takes the shape of a pancake (again) but this time, the drop is in midair.

This phenomenon is different to a drop falling on other surfaces as in this case, the drop crashes on the surface leaving only a small quantity of the water to bounce up.
Physicists have also found out that the actual speed of a drop influences its deformation but not the time taken for it to get in contact with the surface. This actually depends upon the mass of the drop.

Anyway why is all this stuff important anyway? Scientists believe that this find may be of interest to the industry. There's a small illustration:
Imagine not seeing droplets of rain on your car's windscreen when it is in fact raining cats and dogs outside. Cool, isn't it? Well this may well be possible with these new data obtained by the scientists from the College de France. How though? Easy enough! The period of contact of the raindrops with the windscreen is so minimal that the driver does not even see them!

Water drops bounces like springs, would you ever have thought of this? No, I'm not sure you would.

About the Author

K.A.Cassimally is the editor in chief of Astronomy Journal and Astronomy Journal Ezine. He is also the co-founder of the RCPL Astronomy Club. K.A.Cassimally is best known for his article 'Harry Potter and the Moons of Jupiter'.
He is also Senior Columnist at BackWash.com where he writes 'Not Scientific Science'.
Website: http://www.rcplastronomyclub.zik.mu
:http://www.backwash.com/content.php?id=358
Email: kcassimally@rcplastronomyclub.zik.mu


http://www.aaarticles.com/article.php?id=18179