Ooh.....shiny....


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Need more space automatons to look like this


Europe is set to launch one of its most challenging space missions to date.
The Goce satellite will map minute variations in the pull of gravity experienced across the planet.
Scientists will use its data to improve their understanding of how the oceans move, and to frame a universal system to measure height anywhere on Earth.
The super-sleek spacecraft will go into orbit on a modified intercontinental ballistic missile from the Plesetsk Cosmodrome in north-west Russia.
http://news.bbc.co.uk/1/hi/sci/tech/7935621.stm"Imagine a snowflake, which has a fraction of a gram, slowly falling down on to the deck of a supertanker. The acceleration that the supertanker experiences from that snowflake is comparable to the sensitivity of our instrument," he told BBC News.
There is however a potential showstopper: the low altitude Goce must fly to get the detail it seeks in the gravity signal. The constant buffeting the satellite receives from the residual air still present in the thermosphere would ordinarily drown out the data.
So Goce employs an ion engine to maintain a steady path - a sort of cruise control. The engine is throttled up and down, producing exquisite levels of thrust by accelerating charged atoms of xenon through nozzles at the rear of the spacecraft.
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Need more space automatons to look like this