Solar System

Why do the planets have different colors?
Which planet has the strongest winds?
What is the largest moon in the Solar System?
Which planet spins the fastest?
Where is the highest mountain in our Solar System?
Are moons always smaller than planets?

How do the planets stay in orbit around the sun?
How did the planets get their names?
How many planets in the Solar System have rings?
Why are all of the planets round?
What is the order of the planets in the Solar System?
What is the solar system?

What is the largest moon in the Solar System?

One of Jupiter's moons, Ganymede, is the largest moon in the Solar System. Ganymede has a diameter of 3270 miles (5,268 km) and is larger than the planet Mercury. It has a rocky core with a water/ice mantle and a crust of rock and ice. Ganymede has mountains, valleys, craters and old lava flows.