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DENVER - NASA has ordered its comet-hunting Stardust probe to burn its remaining fuel, setting off a series of events that will shut down the spacecraft after a 12-year career.
Engineers gave the order Thursday from Lockheed Martin's Denver complex, where Stardust was built.
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Spacecraft don't carry fuel gauges because they don't work in zero gravity.
Stardust was launched in 1999. It completed its primary mission in 2004 by flying through a cloud of dust and gas enveloping the Wild 2 comet and capturing samples. Those were sent to Earth for study via a parachute-equipped canister.
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