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Saturday, 9 March, 2002, 11:14 GMT
Hubble goes back to work
Astronauts on board the space shuttle Columbia have released the repaired Hubble Space Telescope (HST) back into orbit after a record-breaking five days of spacewalks.
Fitted with state-of-the-art solar panel wings, a new power unit and a better camera, Hubble is ready to resume its work, revealing the secrets of the Universe.
Over the past five days, two teams of spacewalking astronauts spent 35 hours and 55 minutes carrying out painstaking repairs on the HST. All the new components passed the initial tests, but the American space agency (Nasa) will not know for at least a month whether an experimental cooling system successfully revitalised an infrared camera. Depths of space The Near-Infrared Camera and Multi-Object Spectrometer, known as Nicmos, stopped working in 1999 after it ran out of coolant unexpectedly.
More than half way through its 20-year mission, Hubble has already taken amazing pictures of deep space and given astronomers their best estimate yet for the age of the Universe. Other equipment fitted this week included the very powerful Advanced Camera for Surveys. This replaces the Faint Object Camera - the last of Hubble's original instruments - and will substantially improve the ability of the observatory to pick out objects at great distances. The changes should enable Hubble to see out its mission, which is due to end in 2010. The Columbia crew of seven is expected to land back on Earth on 12 March.
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