This exhibit from Exploratorium Exhibit Services simulates the formation of desert landscapes. The site provides a link to a QuickTime video of the exhibit.

This collection of animations introduces students to planetary motions, gravitational effects, and the scale of astronomical distances. Students can view visualizations of Earth's changing seasons, circumpolar motion,...

An algebra-based overview of elementary and pre-telescope astronomy. Topics covered include sundials, seasons, calendars, precession, shape and rotation of Earth, Greek astronomy, the path to heliocentric theory and...

"Where did everything come from?" This is a big question, so it is only fitting that the answer is found in the Big History Project. This free online course, designed for high school students, takes learners on a journey...

This unit consists of a variety of materials that explain the shape of the Earth and how it is measured. There is a set of 'proofs' that the Earth is round, an account of how Greek geographer and mathematician...