front 1 asteroid | back 1 a small rocky body orbiting the sun |
front 2 austeroid belt | back 2 the region of the solar system between the orbits of mars and Jupiter |
front 3 atmospere | back 3 a mixture of gasses that surround a planet or moon |
front 4 comet | back 4 a ball of frozen dust and rock that orbits the sun and has a tail |
front 5 crater | back 5 a large round pit caused by the impact of a meteoriod |