Jupiter’s moon Ganymede has salts and organic ... Ganymede, which is the largest moon in the Solar System, is also one of its ‘ocean worlds’. Most of these are moons that have an icy crust ...

Some of the most fascinating worlds in our cosmic neighborhood are not planets, but the moons that orbit around them. When you purchase through links on our site, we may earn an affiliate commission.

So exactly how many solar system moons have we found ... according to The Planetary Society. Starting closest to the sun, our home star's nearest neighbors, Mercury and Venus, have no true ...

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 ...

Astronomers have discovered 12 new moons around Jupiter, putting the total count at a record-breaking 92 for our solar system ... Astronomical Union’s Minor Planet Center, said Scott Sheppard ...

The answer, it turns out, depends on your definition of a moon. The International Astronomical Union (IAU) officially recognizes 288 planetary moons orbiting the solar system's eight worlds, according ...

The sea inside Saturn’s satellite Mimas formed in the past 25 million years, a blink of the eye in geological terms. Mimas joins a growing list of icy moons that are also ocean worlds.