The Hubble Space Telescope has watched planets, galaxies, stars and suns for the past 17 years. But as people looked for stars in this week?s mostly cloudy skies in vain, the telescope?s main camera ? 380 miles above the clouds ? was also blind.

During the weekend, NASA scientists at the Goddard Space Flight Center in Greenbelt, Md., will attempt to reroute power from a backup supply to the satellite?s main camera, restoring sight to the Hubble?s prized instrument.

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