Safe mode places Hubble in a configuration that should allow controllers on the ground to diagnose and correct the problem before bringing the spacecraft back into service. The Hubble Space Telescope has to remain steady when it is directed toward its targets and the affected gyroscope is used for this purpose. While the telescope’s instruments are still operational – Hubble’s science operations have been placed on hold for now. Hubble entered into safe mode almost a week ago on Friday, October 5 around 6:00 p.m. NASA’s Hubble Space Telescope hasn’t had a tune up in almost 10 years and it has encountered a problem with one of the three gyroscopes actively being used by the spacecraft. The Hubble Space Telescope as seen by the departing STS-125 crew after a week servicing the observatory in 2009.
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