What's In An Alien Planet's Atmosphere? | Video

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Added 10 years ago by shub in Outer Space & Universe

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When a planet transits its star, the change in light tells its tale. Size, mass and atmospheric composition can be derived. Especially critical: Does it have oxygen, the marker of life? ---- Signs of Water Found on 5 Alien Planets: http://goo.gl/uxz5Qb

Credit: NASA / GSFC

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