Test your knowledge about the solar system with games and activities designed to help explore what you know about the sun, the planets and their moons, space rocks, the Milky Way, and related topics.

Material to begin an exploration of the Solar System: the characteristics of the planets, theories about planet formation, and more. An hour-long video is accompanied by learning goals, an outline and overview, details on star formation,...

Find lesson plans, worksheets, photo galleries, and related links for teaching about the weather systems of planets in our solar system.

What makes up the Solar System? Kid astronomers learn about the planets and the sun.

Amazing Science looks at the Solar System with this FAQ site and lesson plan.

Learn about the lives of stars, and how stars and planets form. The Interactive activity, 'Planet Families' requires Adobe Flash and cannot be launched.

In ancient times only five planets were known: Mercury, Venus, Mars, Jupiter, and Saturn. Learn about Greek astronomer Ptolemy's theory for the solar system that was to survive for fourteen centuries.

Created to teach students of the 21st century, SOPHIA is bringing Mars straight to your fingertips. Discover what scientific discoveries are occurring in the rest of the universe with this interactive tutorial.

Quaoar, the most recent addition to our solar system, has displayed many planet-like characteristics but has yet to be named "the 10th planet." Learn more about the interesting find here. Many links to various sites on Quaoar and the...

Kids learn about the ice giant planet Uranus of the Solar System including fun facts, mass, day, year, and distance from the Sun. Astronomy for kids and teachers.

Kids learn about the planet Venus of the Solar System including fun facts, mass, day, year, and distance from the Sun. Astronomy for kids and teachers.

Kids learn about the ice giant planet Neptune of the Solar System including fun facts, mass, day, year, and distance from the Sun. Astronomy for kids and teachers.

Kids learn about the planet Saturn of the Solar System including its rings, mass, day, year, and distance from the Sun. Astronomy for kids and teachers.

Create a classroom model of the solar system while teaching about relative size of all the planets, and each planet's distance from the sun.

A collection of audio lectures from an introduction to astrophysics course taught at the University of California, Berkeley. The course discusses the solar system, stars, quantum mechanics, gravitation, and cosmology focusing on how...

This article answers some of the most common questions about Mars: Why is it red? Is there water on Mars? What else have scientists discovered from spacecraft that have landed there? Also, visitors can follow links to learn more about...