Without enough liquid water on the surface, a planet's atmosphere can become choked with carbon dioxide, raising temperatures ...

The newfound exoplanet, called Kepler-139f, is a gigantic world roughly twice the mass of Neptune and 35 times the mass of ...

Habitable alien planets may be less common than previously believed. The requirements for life to get started on an alien planet could be getting more stringent, ...

When NASA launched the Kepler Space Telescope in 2009, its mission was clear: to explore the stars and uncover distant ...

Is intelligent alien life really out there? With powerful telescopes identifying more potentially habitable planets each year ...

NASA has confirmed the discovery of an Earth-sized planet parked right in the “habitable zone” of a distant red dwarf star.

Astronomers have discovered thousands of exoplanets, some in the so-called habitable zone, Does that mean these planets could ...

The discovery of a potentially habitable exoplanet by the James Webb Space Telescope sparks fresh curiosity across science ...

Scientists from MIT, University of Liege, and elsewhere, have found not one, not two, but three planets orbiting a single star, all of which seem to be habitable by a variety of measures. The team ...

Yahoo Racing is powered by Motorsport Network, providing expert reporting, analysis, and insider access across the world’s top racing series. MOUNTAIN VIEW, Calif. — NASA's planet-hunting ...

Kepler 186 sits in a habitable zone similar to Earth, though it orbits an M1 dwarf star. (Image credit: NASA Ames/SETI Institute/JPL-CalTech) When is an alien world habitable?

Is there really alien life on this exoplanet? We asked 10 experts. A team of astronomers claims to have sniffed out a “biosignature” in the atmosphere of a distant planet called K2-18b.