What planet is most like Earth? Reseachers have identified several exoplanets similar to our planet, but none that are an exact twin. Learn how new technology could help aid in the search.

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 ...

Discovered by NASA’s Kepler spacecraft, Kepler-10c is a massive exoplanet that challenges existing theories about planetary formation and habitability. Dubbed a “mega-Earth,” this planet’s ...

Data from the Kepler project has confirmed a new world that fulfills the telescope's goal of locating Earth-sized planets ...

Since the Kepler Space Telescope began its prowl for exoplanets in 2009, it has uncovered a strange pattern among these alien ...

Astronomers and philosophers have long speculated on the possibility of planets orbiting distant stars. In the 1990s the first of such objects, now called exoplanets, were discovered by astronomers.

Discovered by volunteer scientists, this alien planet is out of synch with its siblings ...

CAPE CANAVERAL, Fla. — Scientists have found a planet way out in the cosmos that’s close in size and content to Earth — an astronomical first. But hold off on the travel plans. This rocky world is so ...

It's hard to remember now, but there was a long period of time in which scientists weren't sure how many planets might actually exist throughout the galaxy, much less how likely it might be to find a ...

Pandora, the latest in a long portfolio of University of Arizona's space science missions, has cleared its last major ...