A passing star may have kicked the weird moons of giant planets like Jupiter and Saturn into place, new research suggests.

Then, on Feb. 11, 1999, it crossed Neptune's path and once again became the solar system's most distant planet — until it was redefined as a dwarf planet. It's a cold, rocky world with a tenuous ...

There is no lava world in the solar system. The closest analog ... said Boley. “When planets initially form, particularly for rocky terrestrial planets, they go through a magma ocean stage ...

Narrator: As the solar system grew, four rocky planets: Mercury, Venus, Earth and Mars, were created closest to the Sun. Made of rocks and metals, they have solid surfaces and a central core of ...

This video explores the key characteristics of each planet within our solar system. Suitable for teaching science at KS1 and ...

Unlike the other planets in the solar system, Mars is distinctly triaxial, meaning it is an ellipsoid with different sizes ...

A terrestrial planet has a solid rocky surface, with metals deep in its interior. In the solar system, these planets are closer to the sun and are therefore warmer than the planets located farther ...

The solar system was literally turning itself ... which was still full of icy and rocky debris. As the planets absorbed those planetesimals or flung them away after close encounters, they cleared ...

lasting perhaps a hundred million years and ending with four surviving terrestrial (rocky) inner planets. The largest ...