The Earth and the moon are always moving! Learn all about how the moon travels around the Earth and why the moon looks different from night to night. The moon g

There is a bright light in the night sky. Sometimes it is round like a ball, sometimes it is a crescent, and sometimes it is not there at all! What is this stra

If you were traveling to outer space, what would you wear? Luckily, some of the best scientists have figured that out for astronauts. NASA scientists and engine

Explore the history and physical details of our planet--including the atmospheric layers, the plates underground, and the solar system--in this engaging nonfict