A free-floating planet drifting through space is being closely followed by scientists who are managing to find out more about ...

A four-planet system reveals remarkable insights about how planets form and how they change during their lifetime.

What was originally thought to be a planet orbiting the Fomalhaut star was probably just the fallout of a wild collision.

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

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

This composite image was weeks in the making, as Horálek’s two "crossings" happened months apart. Mars traced its path ...

Leonardo Testi and team investigate the initial conditions for planet formation in this special astronomy focus ...

Mercury has long baffled astronomers because it defies much of what we know about planet formation. A new space mission ...

There are a couple of ways that scientists can date planets, so which planets formed first in our solar system? When you purchase through links on our site, we may earn an affiliate commission. Here’s ...

Astronomers have spotted a lonely world roughly the size and mass of Saturn, drifting through the Milky Way without a star to ...