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Astronomers searching for another Earth are getting closer, thanks to recent discoveries by the Kepler space telescope.

NASA's MESSENGER Satellite Captures Spectacular Color Mosaic of Mercury by NASA Goddard Photo and Video, via Flickr

Infographic: How types of galaxies are identified.

A luminous blue variable star vaporizing the end of a dust pillar in the Cygnus X star forming region. High res (25 mb)