Astronomers have confirmed Gliese 3378b — a rocky planet about 2.3 times Earth mass — orbiting comfortably in the habitable zone of a red dwarf star just 25 light-years away. With a 21-day orbit and just the right distance from its cooler star, liquid water could theoretically exist on its surface. The findings, published in the Astrophysical Journal, make it one of the closest potentially habitable worlds ever catalogued. Would you vote to send a probe there in your lifetime?
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