A potential new type of celestial object has all the makings of a normal small galaxy. It’s rich with the same hydrogen gas ...

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

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

Astronomers may have finally worked out how planets between the size of Earth and Neptune – which aren't found in our Solar ...

What is Guardians of the Galaxy Vol. 3's fleshy tentacle planet that The Guardians spacewalk on in the trailer? Here's how ...

Astronomers have signalled the discovery of a planetary body roaming the Milky Way that is not gravitationally bound to the ...

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

Thanks to the discovery of thousands of exoplanets to date, we know that planets bigger than Earth but smaller than Neptune ...

Most planetary systems contain worlds larger than Earth but smaller than Neptune, and the low-density planets around one ...

A lonely world the size of Saturn is drifting through the Milky Way with no star to warm it, and for the first time ...

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

Astronomers have finally weighed a wandering “rogue” planet, uncovering a Saturn-mass world flung into the galaxy after a ...