SPACE PHOTOS THIS WEEK: Milky Way Twin, "Exomoon," More

SPACE PHOTOS THIS WEEK: Milky Way Twin,
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September 8, 2009--Shadows spilling across Saturn's tiny moon Janus make a prominent crater seem like the mouth of a cosmic vase in this newly released picture taken by NASA's Cassini orbiter.

Saturn has more than 50 named moons, and Janus is one of the closest to the ringed planet. The 111-mile-wide (179-kilometer-wide) moon was discovered in 1966 and was named for the Roman god of doors, gates, beginnings, and endings.
— Image courtesy NASA/JPL/Space Science Institute
 
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