Tuesday, March 14, 2006

'Comets are born of fire and ice'

'Comets are born of fire as well as ice, the first results from the US space agency Nasa's Stardust mission show. In January, Stardust's sample return capsule landed in Utah, carrying over a million tiny comet grains inside. Some of these grains contain material that formed at extremely high temperatures, scientists have found. This is a surprise. Comets formed in the cold, outer-reaches of the early Solar System, and were never exposed to such extreme heating...' More


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