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The Most Amazing Alien Planet Discoveries of 2013

Mike Wall
Published: December 29, 2013

The Most Amazing Alien Planet Discoveries of 2013

NASA/JPL-Caltech

Data from NASA's Kepler mission finds evidence for at least 100 billion planets in our galaxy. Image released January 3, 2013.

While astronomers didn't bag that elusive first "alien Earth" in 2013, they made plenty of exciting exoplanet discoveries during the past year.

Click through to see a list of the top exoplanet finds of 2013, from a tiny world about the size of Earth's moon to a blue gas giant on which it rains molten glass.


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