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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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Why doesn't NASA attach the Hubble Space Telescope to the International Space Station (ISS) to service the telescope safely? Is that technically feasible? | Astronomy.com
Sky-Watcher Australia - Can you photograph the ISS (International Space Station) using a Sky-Watcher 250mm (10") Dobsonian telescope? Can you even image the astronauts on a spacewalk? In this remarkable image Szabolcs
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