The American Astronomical Society (AAS), established 1899, is a major professional organization in North America for astronomers and other scientists and individuals interested in astronomy and astronomy research. The...

This video segment, adapted from a NOVA broadcast, explores the possibility that extraterrestrial life might exist, and that there may even be advanced alien life. The segment covers the Search for Extraterrestrial...

This site provides useful interactive tools for teaching astronomy and space science. It includes an Earth and Moon viewer where users can set the time and a variety of points to view the Earth and Moon. Orbits in...

This is an archive of questions and answers about Mars. It is divided into Beginner, Intermediate, and Advanced categories and covers such topics as the possibility of life on Mars, Martian atmosphere and geography, and...

Quia is short for Quintessential Instructional Archive. This site offers a collection of astronomy-based computer activities and quizzes developed by educators for students. Games include concentration (memory), word...