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A team of astronomers announced they have discovered the smallest and potentially most Earth-like extrasolar planet yet. Five times as massive as Earth, it orbits a relatively cool star at a distance that would provide earthly temperatures as well, signaling the possibility of liquid water.
"It's sort of at the 'Goldilocks' distance," says Charbonneau—closer to its star and the heat would vaporize any water; farther away and water would freeze