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Submission + - Mini-Mercury: Tiniest Exoplanet Discovered (discovery.com)

astroengine writes: "Astronomers have discovered the smallest planet beyond the solar system: a mini-Mercury that is hellishly hot, probably rocky and lacking atmosphere and water. The planet, known as Kepler-37b, is one of a trio of planets orbiting a yellow star similar to the sun that is located about 210 light-years away in the constellation Lyra. "When we first found exoplanets, they were all much larger than anything we have in the inner solar system. We didn't know of anything that was smaller, so we didn't know about the architecture of other star systems at the low range. This is the first time we’ve been able to probe the smallest range, smaller than anything we have in our solar system,” Thomas Barclay, with NASA's Ames Research Center in Mountain View, Calif., told Discovery News."
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Mini-Mercury: Tiniest Exoplanet Discovered

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