A manmade object that orbits a planet.
Artificial Satellite
A moon in orbit around a planet.
Natural Satellite
The path taken by one body in space around another.
Orbit
The sun and the planets and other objects in orbit around it.
Solar System
Large lumps of ice and dust that orbit the sun.
Comet
A piece of rock or dust that makes a streak of light in the night sky (or a shooting star).
Meteor
A stony or metallic object that has fallen to Earth from outer space.
Meteorite
A large collection of stars and their solar systems.
Galaxy
The galaxy containing our Sun and Solar System.
Milky Way
Everything that exists - including all matter and time.
Universe