Dazzling distant galaxies

Associated Press
This artist rendering released Monday Jan. 7,2013 by Harvard-Smithsonian Center for Astrophysics shows the different types of planets in our Milky Way galaxy detected by NASA’s Kepler spacecraft. A new analysis of Kepler data found there are at least 17 billion planets the size of Earth. (AP Photo/Harvard-Smithsonian Center for Astrophysics)

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An artistic sampling of some far-away worlds.

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