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How Scientists Know Alien Planet Kepler-10b is a Small, Rocky World
(SPACE.com)
Space / Astronomy Related News
SPACE.com -
This story was updated at 10:16 p.m. ET.
SEATTLE — Astronomers announced the discovery today (Jan. 10) of the first "unquestionably rocky" alien world — a planet called Kepler-10b.
Scientists have announced other rocky exoplanets in the past, but Kepler-10b earns its title, researchers said, because they're sure of its composition. And that's because they know its host star so well. ...
Source: Yahoo! News: Space/Astronomy