4.4 Formation of the Solar System
Moons
A moon is a large body that orbits a planet. Most of the moons in our solar system likely formed when their parent planet formed. One exception to this is Earth's moon. Scientists believe that our moon formed when a large body hit Earth, creating a blast of debris and molten rock. This material was in orbit around Earth, and eventually joined to form our moon.
Click on the graphic below to learn more about the Jovian moons.
