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

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

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

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

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

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

Stars and planets are inextricably linked. They form together and stars shape the fate of planets. Stars create the dusty ...

New research tracks young planets around a nearby star, showing how large, gas-rich worlds shrink over time to become the most common planets in the galaxy ...

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

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 ...

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