"Choosing Your First Telescope" with J. Kelly Beatty
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11 سال پیش
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J. Kelly Beatty from Sky
J. Kelly Beatty from Sky and Telescope Magazine offers a guide to choosing your first telescope.
Observatory Night from December 19, 2013 at the Harvard-Smithsonian Center for Astrophysics
Observatory Night from December 19, 2013 at the Harvard-Smithsonian Center for Astrophysics
11 سال پیش
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