The Sun is at the center of the solar system and holds most of its mass.

All the planets, including Earth, revolve around the Sun in elliptical orbits.

The Sun's gravity keeps the planets in their orbits.

Each planet also rotates on its own axis as it orbits the Sun.

The solar system as a whole moves through space, orbiting the center of the Milky Way galaxy.

It takes about 225 to 250 million years for the solar system to complete one orbit around the Milky Way.

The Sun also rotates on its axis, taking about 25 to 35 days to complete one spin depending on the part of the Sun.

Moons orbit planets while the planets orbit the Sun.

Asteroids, comets, and dwarf planets also move around the Sun in their own orbits.

The entire solar system is not still—it moves in a curved path, like a spiral, as it travels through the galaxy.