This 28 slide PowerPoint describes comets, asteroids, and meteors. It begins by defining a comet and then describes the five parts that make up a comet: The nucleus, coma, ion tail, dust tail, and hydrogen envelope. There are pictures to illustrate each part. It continues by discussing the orbit of comets and from where they originate. Next, asteroids are defined and described. Several examples of named asteroids are given. Finally, the difference between meteoroids, meteors, and meteorites are discussed and illustrated. There are a few video links suggested throughout the PowerPoint. When teaching this lesson in my class, my students answer questions on the Comets, Asteroids, and Meteors worksheet that may be purchased separately.