“I think I finally found the answer to a question I’ve been asked a 1000 times. ‘Can we see the Great Wall of China from the #ISS?’ Next to impossible with the naked eye. But I tried with an 800 mm tele lens. Still tough to spot,” writes ESA Astronaut Alexander Gerst on 21 June 2018. [5568x3712][OS] via /r/spaceporn http://bit.ly/2QmTBwV
via Tumblr http://bit.ly/2SFwYpy
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