New simulations examine whether the seven planets in the TRAPPIST-1 system could host moons, showing that only small, close-orbiting moons could remain stable over long periods ...

Two small planets might be sculpting an enormous dust ring around the star Fomalhaut, a mere 25 light-years away from Earth. But it’s not too likely that either planet is the notorious Fomalhaut b, ...

Gravity is usually presented as the most familiar of nature’s forces, the quiet background pull that keeps feet on sidewalks ...

Jupiter is the largest planet in the solar system, known for its massive size, strong gravity, powerful storms and many moons ...

Dr. James O’Donoghue, a Japan-based planetary scientist, has made some incredible educational astronomy videos before. Including a video that showcases relative cosmic velocities to understand better ...

Our solar system officially houses eight planets, but some scientists say there could be a ninth. And that’s not just Pluto aficionados – evidence suggests a huge undiscovered world lurks on the dark ...

By tracking tiny stellar wobbles, astronomers have detected planets forming around young stars for the first time.

Planets start as messy clumps of rock and dust. Gravity pulls everything toward the center. Over time, this force smooths out ...

Super-Earths have been seen as planets that have the potential to host alien life. These types of planets are more common than Earth. There is just one problem with Super-Earths: gravity. Stronger ...

NASA reports more than 400 gas giants – large gas planets like Jupiter or Saturn – have been discovered outside of Earth's solar system. However, the possibility that a gas planet could exist in the ...

How do you explore the interior of a planet without ever touching down on it? Start by watching the way the planet spins, then measure how your spacecraft orbits it — very, very carefully. This is ...