Volume 92 Issue 50 | p. 6 | News of The Week
Issue Date: December 15, 2014

Comets Questioned As Water Source

Space: Rosetta spacecraft reports high D/H ratio from comet 67P
Department: Science & Technology
News Channels: Analytical SCENE
Keywords: Rosetta, comet, hydrogen/deuterium ratios, water

Water contained in the comet 67P/Churyumov-Gerasimenko has a deuterium/hydrogen ratio vastly unlike that on Earth, a new study reports (Science 2014, DOI: 10.1126/science.1261952). The finding implies that comets may not have seeded our nascent planet with water.

The results, obtained from the ROSINA instrument aboard the European Space Agency’s Rosetta spacecraft, which is orbiting the 2.5-mile-long comet, were announced at . . .

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