Comet dust in Antarctica. Free Technical Library News

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Comet dust in Antarctica

18.11.2010

Employees of the Franco-Italian scientific Antarctic station "Concordia" found microscopic particles less than a millimeter in diameter in a clean layer of snow at a depth of four meters.

The total weight of the collected particles is about one milligram. At 50-80% they consist of carbonaceous material - highly modified organic matter. They contain deuterium, and the ratio of its amount to ordinary hydrogen is ten times higher than in terrestrial water.

Scientists suggest that this is the dust of some kind of comet - a sample of the material from which the solar system arose. The dust fell on the pristine Antarctic snow as the Earth passed through the comet's tail.

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