Thread: Telescope
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Old 05-December-2002, 07:43 PM
aurorae aurorae is offline
Senior Member
  
Join Date: Oct 2001
Posts: 321
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See:

http://www.astunit.com/tutorials/evaluating.htm

or

http://home.earthlink.net/~hakaida/

or

http://www.perkins-observatory.org/FAQ.index.html
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