December 8, 2021

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Hubble telescope revived after a grueling month of darkness. Here’s what went wrong.

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After spending more than a month orbiting Earth in “safe mode,” NASA’s Hubble Space Telescope is back online once again, with all of its science instruments fully operational, according to a statement from NASA.

Engineers revived the satellite — launched in 1990 and built with hardware from the 1980s — on Saturday (July 17) after identifying a possible glitch in Hubble’s Power Control Unit, which “ensures a steady voltage supply to the payload computer’s hardware,” according to NASA.

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