The telescope
Astronauts at work on Hubble
May 24, 2009 · ESA/Hubble · Cosmic Origins Spectrograph , Hubble Space Telescope , Servicing Mission 4
Astronauts Andrew Feustel (partially obscured at top) and John Grunsfeld work to install the new Cosmic Origins Spectrograph (COS) onboard the NASA/ESA Hubble Space Telescope on the third spacewalk of Servicing Mission 4.
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