Astronomer Natalie Batalha discusses the possibility of alien Earth-like planets and what the discovery of a true Earth twin could mean during a talk at the 221st American Astronomical Society meeting... more 
Astronomer Natalie Batalha discusses the possibility of alien Earth-like planets and what the discovery of a true Earth twin could mean during a talk at the 221st American Astronomical Society meeting in Long Beach, Calif., on Jan. 8, 2013. less 
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SPACE.com | Photo By American Astronomical Society photo © 2013 Joson Images
Wed, Jan 9, 2013 4:48 PM EST