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Types of Telescopes | What's the Best Choice for a Beginner?
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Cat's Eye Nebula Hangs in Space (NASA, Chandra, 7/30/08) | Cat's eye nebula, Planetary nebula, Space and astronomy
Size comparison of existing and planned telescopes : r/space
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What type of telescope is best for the beginner in astronomy and what are the advantages of refractors or reflectors? - Quora
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PDF) Automated Multidisciplinary Optimization of a Space-Based Telescope
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