Have you ever seen a comet or a shooting star? You may think they look pretty, but these giant space rocks can cause major destruction. Scientists keep a close

Earth has many satellites, but the Moon is Earth's only natural satellite. Spacecraft and astronauts have visited the Moon to learn more about it. From the Apol

Jupiter is bigger than any other planet in our solar system. It has rings and centuries-old storms. It has more than sixty moons, too—some with underground oc

On a dark night as you watch the sky with your friends, a rock with a fiery tail shoots across the sky. A comet! Asteroids and comets hurtle through space, some

This visually stunning guide gives an up-close look at some of the more elusive objects in space. Definitions of better-known objects, such as comets, as well a