asteroid - one of the many small PLANETs that move around the sun, especially between Mars and Jupiter, natural satellite - a natural object that moves around a planet, space shuttle - a form of transport that is designed to go into space and return to Earth several times, man-made satellite - a machine that has been sent into space and goes around the Earth, moon etc, used for radio, television, and other electronic communication, cosmos - the whole universe, especially when you think of it as a system, re-entry - when a spacecraft enters the earth's ATMOSPHERE again, meteorite - piece of rock or metal from space that has landed on Earth, orbit - to travel around a much larger object such as the Earth, the sun, atmosphere - the mixture of gases that surrounds the Earth, launch - the action of sending a spacecraft into the space,

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