Astronomers Discover New 'Mega-Earth' Planet

Astronomers Discover New 'Mega-Earth' Planet Play

June 4: MIT Professor of Planetary Science and Physics Sara Seager talks about the surprising discovery of a “mega-earth” that's rocky and not a ball of gas: exoplanet Kepler-10c, 560 light-years away, 17-times heavier and 2.3 times larger than Earth.

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