The star system V1298 Tau reveals that many planets begin as large, low-density worlds that slowly shrink and shed their ...

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

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

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

Planets usually stay close to their host stars, tracing steady paths shaped by gravity. Yet some planets break free and drift ...

Jupiter is old. Like 4.5 billion years old. It started as a swirling disk of gas and dust that formed into a pretty big ...