Asteriod

A small rocky body orbiting the sun.

Asteroid Belt

The region of the solar system between the orbits of Mars and Jupiter.

Atmosphere

A mixture of gasses that surrounds a planet or moon.

Comet

A ball of frozen dust and rock that orbits the sun and has a tail.

Crater

A large round pit caused by the impact of a meteoroid.

Galaxy

A collection of stars,dust,and gas bound together by gravity.

Gas Giant

The outer planets.

Gravity

A force that pulls objects toward each other.

Planets

A celestial body moving in an elliptical orbit around a star.

Moon

A natural object that orbits a planet.

Milkyway

The galaxy containing the solar system.

Orbit

The path an object follows as it moves around another object.

Revolution

The movement of an object around another object.

Rotation

The spinning motion of a planet on its axis.

Solar System

The collection of eight planets and their moons in orbit around the sun.

Star

A ball of hot gas, primarily hydrogen and helium,that undergoes nuclear fusion.

Terrestrical

The name of the inner planets.

Drawf Planet

A celestial body resembling a small planet but lacking certain technical criteria that are required for it to be classified as such.

Light year

The distance light year travels in one year.

Kupier Belt

A region of the solar system that is just beyond the orbit of Neptune.

Meteor

A small body of matter from outer space that enters the Earth's atmosphere appearing as a streak of light.

Universe

All of space and everything in it.