Supersonic “Hail” Seeds Star Systems With Water

Publication: National Geographic News   Date: August 29, 2007   View Article

Evidence of water vapor “raining down” on a newly forming star system is offering the first direct look at how water likely gets incorporated into planets, NASA researchers announced.

The water—enough to fill Earth’s oceans five times over—falls at supersonic speeds in the form of a hail-like substance from the envelope of dust and gas that gave birth to the star.

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