Exoplanet Proxima b
Exoplanet Proxima b This artist’s impression shows the surface of exoplanet Proxima b orbiting the red dwarf star Proxima Centauri—the closest star to Earth. The planet is similar in size to Earth and lies in its star's habitable zone, the not-too-hot, not-too-cold region where temperatures are suitable for liquid water to exist on the surface. ESO/M. Kornmesser

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