Stars Near Far - First-Start Science Author:Robin Dexter, Susan T. Hall (Illustrator) Something to Think About... — Did you know? — * There are more than 200 billion billion stars. — * Stars are made mostly of hydrogen and helium. — * Why can't we see stars during the day? — * Why are stars different colors? — Have you ever seen a falling star? It really i... more »sn't a star at all. It's a meteor. A meteor is a piece of metal or rock that burns up as it falls through the air.« less