604px-STS-103_Hubble_EVA.jpg | Naked Scientists - 188BET竞彩,188金宝慱亚洲体育app

Astronauts Steven L. Smith, and John M. Grunsfeld, appear as small figures in this wide scene photographed during extravehicular activity (EVA). On this space walk they are replacing gyroscopes, contained in rate sensor units (RSU), inside the Hubble...

Credit:

CC0 - NASA

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