Explains the differences between asteroids and comets. Presents a chart showing a size comparison between some known asteroids and comets.

Learn about asteroids. What are they? What is their structure? Difference between asteroids and comets? The brief, to the point text makes this site most suitable for the younger researcher.

This comprehensive site delves into other aspects of our solar system besides the planets and the sun. Click on the topics on the right like solar winds, the heliosphere, the heliopause, asteroids, comets, and more.

Learn the difference between asteroids and comets, meteoroids and meteorites, and more!

This is a biography of Carolyn Shoemaker. This account tells of her growing up with no interest in science, then discovering more comets and asteroids than any other living astronomer. Links to additional material and photographs are...

This site has links to all the planets, providing an overview of the solar system. It also contains information about asteroids, meteors, comets and other features of our solar system.

Kids learn about the glossary and terms for the science of astronomy including words and definitions such as asteroid, comet, meteoroid, galaxy, eclipse, etc.

Explore space beyond Pluto in the Kuiper Belt region of our solar system. Find out about the space bodies that exist there and what our space missions have taught us about this far away region.

This site from the National Aeronautics and Space Administration provides a fun project on rockets. "Nothing in space stands still. Everything either orbits around something else, or moves toward or away from something else. So how do...

"One of the great mysteries in science is the extinction of the dinosaurs at the end of the Mesozoic Era some 65 million years ago. Who (or more likely what) caused it is unknown and a subject of great debate." Many theories are touched...

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...