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Q&A How large of a telescope would one need in order to read someone's lips on a planet light years away?

If I wanted to image an Earth-like planet at a resolution where one could read the lips of a human speaking on the surface 1, 10, and 1000 light years away, how large would the telescope reflector ...

3 answers  ·  posted 8y ago by HighTechGeek‭  ·  last activity 5y ago by HighTechGeek‭

Question space planets light