PASADENA, Calif. — NASA’s Kepler mission has discovered two new planetary systems that include three super-Earth-size planets in the “habitable zone,” the range of distance from a star where the ...

What if humanity could no longer live on Earth? Perhaps a catastrophic event forced us to find a new home among the stars.

It's remarkably similar to Earth.

Relative sizes of the newly discovered habitable-zone planets and Earth. Left to right: Kepler-69c, Kepler-62e, Kepler-62f and Earth (except for Earth, these are artists' renditions). Image credit: ...

Scientists analyzing four years of data from NASA’s Kepler mission have released a new catalog of exoplanet candidates. The catalog adds more than 500 new possible planets to the 4,175 already found ...

Astronomers have identified a potentially habitable, Earth-size planet located about 146 light-years from our solar system, ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. A super-Earth basks in the glow of its star in this artist's impression. Is the world habitable ...

Learn about HD 137010 b, a cold Earth‑sized planet candidate that sits near the outer edge of its star’s habitable zone.

SIGNS of an alien planet that’s about the same size as Earth have been picked by up a Nasa telescope. Scientists say it might ...