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Telescopes are tools that astronomers use to bring isolated celestial bodies to almost within a touching distance. They are available in four types, including reflectors, refractors, compound, and catadioptric, each with a different lens setup.
Telescopes are tools that astronomers use to bring isolated celestial bodies to almost within a touching distance. They are available in four types, including reflectors, refractors, compound, and catadioptric, each with a different lens setup.