Potentially habitable exoplanet candidate spotted around Alpha Centauri A in Earth’s backyard


The nearest solar system to our own may actually host two potentially life-supporting planets, a new study reports.

In 2016, scientists discovered a roughly Earth-size world circling Proxima Centauri, part of the three-star Alpha Centauri system, which lies about 4.37 light-years from Earth. The planet, known as Proxima b, orbits in the “habitable zone,” the range of distances from a star at which liquid water could exist on a world’s surface. (A second planet, Proxima c, was later discovered circling the star as well, but it orbits farther away, beyond the habitable zone’s outer limits.)

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