Nine Planets
The Eight Planets: Earth
Excellent Eight Planets site that provides a vast amount of information about planet Earth. Very comprehensive and complete site.
Other
University of Leicester: The Solar System
Resource explores the solar system, with an in depth discussion of each of the planets and their properties.
Nine Planets
The Nine Planets: Asteroids
A plethora of information about Asteroids. This site provides lots of in-text links to information, pictures of asteroids, a table full of information about asteroids, as well as links to more information about asteroids.
Space Telescope Science Institute
Amazing Science: Solar System Trading Cards
Amazing Science looks at the Solar System with this FAQ site and lesson plan.
Science4Fun
Science4 Fun: Earth
Learn fun facts and details about the geography and composition of Earth, the third closest planet to the sun and the only planet that contains life.