09:32 11.12.2014 Source: BBC Russian Service
European Space Agency “Fila” continued examination of the comet 67 / P Churyumov-Gerasimenko in November handed in the mission control center data on the water with this celestial body: as scientists have found, the contents of the heavy isotope of hydrogen – deuterium – it is three times larger than the Earth’s.
This deprives the soil theory that the water on the Earth early in its history has been brought by comets.
As noted in the publication in the journal Science, researchers, now becomes the preferred theory that the source of Earth’s water served as asteroids – rocky celestial bodies that formed closer to the Sun than the comet.
However, in the ESA specifies that the need to gather more information before the theory of cometary origin of water on Earth will be completely discarded.
At the University of Bern in Switzerland noted that the ratio of water molecules with deuterium molecules with a conventional hydrogen isotope in the world consistently and is approximately 3 to 10 thousand. BBC Russian Service
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