occurs today in order to repair the Advanced Camera for Surveys (ACS) on the Hubble Space Telescope that was never intended to be opened and serviced in space. In addition, astronauts will install the most advanced spectrometer ever flown in space, the Cosmic Origins Spectrograph (COS.) While the first two spacewalks encountered some minor difficulties with equipment installation, all of the new instruments have passed their power and functionality tests according to NASA.The image shown above (click for hi-res version) was taken yesterday during EVA 2 and shows low level winds above the Cape Verde Islands off the northwestern coast of Africa.
UPDATE: EVA 3 complete (and successful).
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