A newly identified Earth-sized exoplanet with a year-long orbit may lie near its star’s habitable zone, but extreme cold could limit its chances of hosting liquid water.

— -- Astronomers on Monday reported the discovery of an Earth-like planet outside the solar system whose size and distance from its own star put it in the "habitable" zone and make for a surface ...

NASA has announced the discovery of an Earth-like planet orbiting a Sun-like star that shares several other similarities with ...

Scientists continue to mine data gathered by NASA's Kepler Space Telescope, retired in 2018, and continue to turn up ...

Alexander Venner picked his way by hand through the data collected by a now-retired NASA telescope called Kepler, which ...

It's been about twenty years since the discovery of the first definitive proof that there are planets outside our solar system, and today NASA has revealed that it has found the first near-Earth-sized ...