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Could there be another planet behind the sun?

If you've read your share of sci-fi, and I know you have, you've read stories about another Earth-sized planet orbiting on the other side of the Solar System, blocked by the Sun. Could it really be there?

dateFeb 24, 2015 in Astronomy
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Does the red planet have green auroras?

Martian auroras will never best the visual splendor of those we see on Earth, but have no doubt. The red planet still has what it takes to throw an auroral bash. Witness the latest news from NASA's MAVEN ...

dateMay 14, 2015 in Space Exploration
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