The larger moons of Pluto and Earth likely formed through a collisional process with Charon and our moon, respectively, ...

The planets and moons then all rotate in the same direction. But only a few moons in our solar system were likely created ...

The planets and moons then all rotate in the same direction. But only a few moons in our solar system were likely created this way. Scientists predict that Jupiter's and Saturn's inner moons ...

Worlds will align for a "planetary parade" in January, with four bright and easily visible to the naked eye. But an even ...

Uranus, the seventh planet of the Solar System, has 27 known moons, most of which are named after characters that appear in, or are mentioned in, the works of William Shakespeare and Alexander Pope.

That said, Earth's moon is notably large in comparison to its parent. The only other one of the inner planets with a moon is Mars, which has two, but they are just tiny asteroid fragments.

Throughout January, a rare planetary alignment will become visible in the night sky, promising a rare celestial delight.

Planets orbit the Sun in roughly circular paths, and moons orbit around planets. Asteroids and comets move in paths which are more oval in shape. The Sun’s gravity holds all of these objects ...