Unlike most of the other moons in the solar system, which are covered with craters, Io’s surface features hundreds of volcanic calderas, or large flat-floored depressions, many of which are ...

The solar system is a vast and mysterious place filled with wonders that continue to intrigue scientists and enthusiasts ...

Like all moons in the outer solar system, it's mostly made of water ice, but its surface is unusually dark. When Cassini flew past it measured its density to be 55% that of water — its interior ...

Like all moons in the outer solar system, it's mostly made of water ice, but its surface is unusually dark. When Cassini flew past it measured its density to be 55% that of water — its interior ...

"I think that there are probably about 10,000 moons in the solar system," Ashton said. But there is no telling how long it could take us to find them all. Editor's note: ...

Earth's moon shines brightly in our sky, but it is not the only satellite in our solar system. Experts estimate there are as many as 170 to 180 moons orbiting the eight planets of our section of ...

There's a new moon king in our solar system: 12 new moons were discovered around Jupiter, which makes it the planet with the most moons. Jupiter is already the biggest planet in our solar system.

On Tuesday, Jupiter officially “gained” 10-12 moons.But that doesn’t make up for the dozens of moons the solar system has lost over time. Unlike the recent crop, the long lost moons were of ...

In our solar system, the impressive rings of Saturn, a planet around which more than 80 moons orbit, represent a relic of a primordial moon-forming disk, said study co-author Stefano Facchini of ...

Since there are more than 150 moons in our solar system, you might think that plenty of other worlds would be occasionally treated to such a celestial shadowing. But unlike Earth, our fellow ...

The space agency has only ever flown one spacecraft, Voyager 2, by the seventh planet in our Solar System. The Voyager spacecraft flew by Uranus a long time ago, in 1985.

Earth's own moon, a beautiful but stark, dead world shaped by ancient volcanoes and countless impact craters, is undoubtedly the most familiar, but it's far from being the most interesting.