The Cosmic Origins of Earth's Water

Published on June 2, 2018
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Why is Earth is a blue planet? Because it’s covered in water! Where did Earth’s water come from? Of course, water isn’t unique to our planet. The origin of water traces beyond the solar system to the earliest days of the universe. Here’s the story of the galaxy’s H2O.

Special thanks to:
David O’Brien, Planetary Science Institute
Wendy Panero, The Ohio State University
Karen Meech, Institute for Astronomy at the University of Hawaii
Shmuel Bialy, Tel Aviv University
Avi Loeb, Harvard University
Ilse Cleeves, Harvard-Smithsonian Center for Astrophysics

References:

Bialy, S., Sternberg, A., & Loeb, A. (2015). Water Formation During the Epoch of First Metal Enrichment. The Astrophysical Journal Letters, 804(2), L29.

Bradford, Charles M., et al. “The water vapor spectrum of APM 08279+ 5255: X-ray heating and infrared pumping over hundreds of parsecs.” The Astrophysical Journal Letters 741.2 (2011): L37.

Cleeves, L. Ilsedore, et al. “The ancient heritage of water ice in the solar system.” Science 345.6204 (2014): 1590-1593.

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