A historic discovery! Today Pale Red Dot announces the discovery of an Earth-size planet in the habitable zone around the closest star in our galaxy, Proxima Centauri. Only four light-years from Earth, the planet is dubbed Proxima b, and is at the right temperature to hold liquid water on its surface. Full story: http://go.nasa.gov/2bFnMy1 Video: ESO Astronomy/PHL @ UPR Arecibo. Music by Lyford Rome. | NASA Planetquest

Landing on Proxima b: The Surprising Reality of Earth’s Nearest Exoplanet