Learn all about these objects found in space. They range in size from very small to almost the size of a minor planet. An asteroid is an object that is neither a true planet nor a comet that orbits the Sun. As a result they are considered minor planets. They are rocky, metallic or icy bodies with no atmosphere. Sizes and shapes of asteroids vary greatly, ranging from 1-meter rocks to almost 1000 km in diameter. A comet is an object made of frozen ice gas and dust that orbits the Sun.They are classified as a small solar system body. Now here's the sequence: you have a meteoroid in space and when it enters the atmosphere it is a meteor and when it strikes the earth it is a meteorite.
