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amateur observing - How powerful a telescope would allow me to view the astronauts aboard ISS do a space-walk? - Astronomy Stack Exchange
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Astronaut John Grunsfeld performs work on the Hubble Space Telescope on the first of five STS-125 spacewalk… | Hubble space, Space telescope, Hubble space telescope
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File:Astronaut Kathryn Thornton during the Second Hubble Space Telescope Spacewalk (28051097461).jpg - Wikimedia Commons
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