This is a diagnostic test developed by the Collaboration for Astronomy Education Research (CAER) for astronomy teachers teaching non-science majors at the introductory level. The first twenty one questions are content...

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...

This web page contains an activity to track the position of the sun at different times during the year. Participants create their own sundials and mark the location of the sun’s shadow over a period of time. An...

This site, created by John Walker of Formilab -- Switzerland, allows users to view the earth and moon, and daylight and night regions, from a wide range of viewpoints. These include from the sun, the moon, the earth, at...

Created by David P. Stern, this set of three web pages provides a calculation of paths, times, and distances for a flight to Mars and back. The author uses a Hohmann transfer ellipse between two circular orbits. This is...