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Isotopic Ratios in Water and the Origin of Earth’s Oceans

Whitepaper #037 submitted to the Planetary Science and Astrobiology Decadal Survey 2023-2032. Topics: habitability and water; primitive bodies

Published onMar 18, 2021
Isotopic Ratios in Water and the Origin of Earth’s Oceans

Comets contain some of the most pristine ice-rich material left over from the formation of the Solar System. The D/H ratio in cometary water provides key constraints on the origin of Earth’s oceans. Measurement of this ratio in a statistically significant sample of comets is a high-priority goal for the next decade.


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