Hubble Trouble: Repairing the Hubble Space Telescope
Space Telescopes Maneuver like CATS - Smarter Every Day 59
Astronauts from the space shuttle Discovery replaced the gyroscopes on the Hubble Space Telescope. Hubble has six gyroscopes. Four of them were non-operational. The last of them broke just a few weeks before the mission. To point at a certain location in space, Hubble needs at least three working gyroscopes.
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