"Rocks from Outer space." The pieces of rocks that come from outer space have three names: meteor, meteorite, and meteoroid. A meteoroid is a piece of matter moving in space. I moves as fast as 40 miles a second. It may be large or small. Most meteoroids are smaller than a grain of sand. As a meteoroid comes into the air near the earth, it catches fire. Most meteoroids burn up before they hit the earth. The flash of light from the burning meteoroid is called a meteor. If a piece of meteoroid fai
