The solar system has many more moons than the one we can see in the sky. But how many do we actually know about? And how many ...

But it’s not just looks. Rocky composition, general size, orbital behaviors—a lot of those qualities can be the same on both ...

I'm a physics instructor who has followed the current theories that describe why some planets have moons and some don't. First, a moon is called a natural satellite.

Ceres is a small, cold dwarf planet in the asteroid belt between Mars and Jupiter, but billions of years ago it could have ...

Even if life never took hold on Ceres, the discovery could help broaden the range of environments that could potentially be ...

Uranus has 28 known moons in its orbit, but thanks to the James Webb Space Telescope, scientists believe they just uncovered ...

One of the brightest stars in the night sky seems to be orbited by a planet like Jupiter. The news is sure to cheer fans of ...

“No other planet has as many small inner moons as Uranus, and their complex inter-relationships with the rings hint at a ...

Astronomers have discovered strong evidence for a giant gas planet in a nearby solar system - with moons that could be habitable.

These moons, however, look very different from our own — and scientists still have a lot of questions about their origins.