Proxima b: A Planet of at Least 1.3 Earth Masses in Proxima Centauri's Habitable Zone

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Scientists using ESO and other telescopes found a planet, Proxima b, orbiting the nearby star Proxima Centauri about every 11 days at roughly seven million kilometers, with a mass at least 1.3 times Earth’s and living in the star’s habitable zone, though intense stellar flares and possible tidal locking raise questions about its climate and liquid water, so direct atmospheric observations are needed; Guillem Anglada-Escudé led the team and calls Proxima b a prime target for future study, with colleagues including Pedro J. Amado, Ansgar Reiners, James S. Jenkins, Michael Endl, and many others involved.

Planet Found in Habitable Zone Around Nearest Star - Pale Red Dot campaign reveals Earth-mass world in orbit around Proxima Centauri
eso.org

Planet Found in Habitable Zone Around Nearest Star - Pale Red Dot campaign reveals Earth-mass world in orbit around Proxima Centauri

Astronomers using ESO telescopes and other facilities have found clear evidence of a planet orbiting the closest star to Earth, Proxima Centauri. The long-sought world, designated Proxima b, orbits its cool red parent star every 11 days and has a temperature suitable for liquid water to exist on its surface. This rocky world is a little more massive than the Earth and is the closest exoplanet to us — and it may also be the closest possible abode for life outside the Solar System. A paper describing this milestone finding will be published in the journal Nature on 25 August 2016.