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.