So far, humanity has yet to find its first "exomoon"—a moon orbiting a planet outside of the solar system. But that hasn't ...

Choose your fighter for the origin of water on Earth! Was it always here or did it come to this planet from somewhere else in ...

Jupiter, as always, is a dazzling object, shining among the stars of Gemini the Twins. It reaches opposition on Jan. 10; this ...

The upcoming year will offer a blood-red moon, spectacular meteor showers and the first glimpse of the sun’s corona since ...

Scientists have discovered a rogue planet roaming the Milky Way after combining observations from Earth and a space telescope ...

An exosyzygy – an alignment of three celestial objects around another star – is predicted to happen later this year, but it ...

Rogue planets — worlds that drift through space alone without a star — largely remain a mystery to scientists. Now, ...

While most planets that we are familiar with stick relatively close to their host star in a predictable orbit, some planets ...

Two separate research teams have observed a previously unseen microlensing event, confirming the existence of a particular ...

In doing so, they found this orphan is within the same weight class as Saturn, strengthening the case that the galaxy teems ...

With sapphire waterfalls, lava rain and orbits around dead stars, these distant worlds push the limits of what’s possible.

Scientists measured mass and distance of free floating planet drifting through space without star for first time.