asteroid

a small rock body orbiting the sun.

asteroid belt

A region of the solar system between the orbit of mar and Jupiter where many asteroids are found.

atmosphere

A mixture of gases that surrounds a planet or moon.

comet

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

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 giants (Jovian Planets)

The name given to the first four outer planets: Jupiter, Saturn, Uranus, and Neptune.

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.

Milky way

The galaxy containing the solar system.

Orbit

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

Revolution

The movement of an object around another object.

Rotation

The spinning motion of a planet on it axis.

Solar system

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

star

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

Terrestrial

The name of the inner planets.

Dwarf 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 travels in one year.

Kuiper Belt

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

Meteor

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

Universe

All of space and everything in it.