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Exoplanets 20/20: Looking back to the future

Geoff Marcy remembers the hair standing up on the back of his neck. Paul Butler remembers being dead tired. The two men had just made history: the first confirmation of a planet orbiting another star.

dateJul 31, 2015 in Astronomy
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New Horizons data hint at underground ocean

Pluto wears its heart on its sleeve, and that has scientists gleaning intriguing new facts about its geology and climate. Recent data from NASA's New Horizons probe—which passed within 7,800 miles of the surface on July ...

dateJul 30, 2015 in Space Exploration
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