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    What is a Moon?

    Planets and asteroids orbit the Sun. Moons—also known as natural satellites—orbit planets and asteroids. Moons come in many shapes, sizes and types. Most are airless, but a few have atmospheres and even hidden oceans. There are hundreds of moons in our solar system—even a few asteroids have small companion moons. More ›

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    Explore in 3D—Eyes on the Solar System

    Eyes on the Solar System lets you explore the planets, their moons, asteroids, comets and the spacecraft exploring them from 1950 to 2050. Ride with the Curiosity Rover as it lands on Mars or fly by Pluto with the New Horizons spacecraft all from the comfort of your home computer.

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    Moons News