Are dozens of intelligent extraterrestrial civilizations lurking right in our home galaxy?
An alien planet that orbits a star other than our sun is referred to as an "exoplanet." Learn more about the types of alien planets, including exoplanets and extrasolar planets, and get the latest news.
A satellite the size of a briefcase successfully detected an alien world, potentially paving the way for a future network of bantam planet-hunting spacecraft.
The closest alien planet to our solar system is even more Earth-like than scientists had thought, new observations suggest.
New imagery apparently pinpoints the spot where a baby planet is forming around the young star AB Aurigae, which lies 520 light-years from Earth.
Scientists suspect they have identified an intriguing new alien planet in a particularly roundabout way.
A new world has been confirmed in the Kepler-88 planetary system, tipping the scales at three-times the mass of solar system giant Jupiter.
Life can thrive in a 100% hydrogen atmosphere, according to a new study. The finding could completely change our understanding of how (and where) life might exist in the universe.
The alleged exoplanet Fomalhaut b was discovered in 2004 and disappeared in 2014. Astronomers now say it was never a planet to begin with.
Scientists analyzing archival data gathered by NASA's defunct Kepler spacecraft just found a hidden gem: an Earth-size world that may be capable of supporting life as we know it.
A distant world about 40 times more massive than Earth may be the remnant core of a giant planet, or a giant planet in the making whose growth stalled, a new study reports.
For the first time ever, astronomers have measured wind speed on a brown dwarf, an object heftier than a planet but not massive enough to host the fusion reactions that power stars.
An exoplanet may be shaped like an American football due to the mighty gravitational forces it experiences close to its star, a new study finds.
Planets like Saturn's moon Titan, one of the most potentially habitable places in the solar system, could reveal their secrets to future telescopes.
Double sunsets may be just as common in our galaxy as the solitary kind that we know on Earth, and this has big implications for our search for life outside the solar system.
Astronomers have spotted the exotic signature of iron rain in the atmosphere of the huge, scorching-hot exoplanet WASP-76 b.
Three teams of astronomers have been fascinated by an alien world known as K2-18b. But what's all the fuss about?