Survey the solar system by viewing this PowerPoint. Amateur astronomers discover that gravity is responsible for Earth's orbit around the sun and the moon's orbit around Earth. They explore the moon's phases and Earth's seasons. This...

Students practice skills used in scientific investigation while studying the three main types of galaxies. Students identify Earth as part of Milky Way galaxy, the parts of galaxies, and the types of galaxies, as well as classify...

Students gain appreciation of the vastness of our galaxy by viewing an applet about the Milky Way. Students hypothesize about how long it would take to get from Earth to Pluto.