NASA
Nasa Star Child:space Probes (Level 1)
This page of NASA's excellent Starchild site deals with Space Probes. Learn about the various planetary probes by clicking on the planet of interest.
NASA
Nasa: Space Place: Where Does Interstellar Space Begin?
Find out about interstellar space, and what characterizes this part of space outside of the heliosphere.
BBC
Bb Ci Space: Solar System
Take a journey through the solar system with this interactive guide. Includes planetary history, "travel information," "tourist highlights," and video clips. Games and quizzes include a Solar System jigsaw that prompts the student to...
NASA
Nasa Space Place: What Is an Exoplanet?
Defines exoplanets and explains how astronomers go about looking for them.
American Museum of Natural History
American Museum of Natural History: O Logy: A Closer Look at Mars
If you look up at the sky on a clear night, you may see a red dot among the stars. This dot is Mars, named in ancient times after the Roman god of war. Although no one has ever visited this red planet, we know a lot about it. This site...