Authored by Nick Strobel, "Astronomy Notes" is an educational resource for introductory astronomy classes for undergraduates. This section gives a extensive introduction to planetary science. Topics in this portion of...

"Powers of Ten", the film made by Charles and Ray Eames in 1977, takes the viewer from the core of an atom to the edge of the universe, moving 10 times further every 10 seconds. The film is about scale and how we view...

This National Aeronautics and Space Administration Facts website presents a history of Dr. Robert H. Goddard, a pioneer of rocketry. The site describes Goddard's achievements and their relationships to advances in...

The Search for ExtraTerrestrial Intelligence (SETI) Institute has as its mission to explore, understand and explain the origin, nature, prevalence and distribution of life in the universe. The Web site contains the...

The Sloan Digital Sky Survey (SDSS) is one of the most ambitious and influential astronomical surveys in history, and "over eight years of operations, it obtained deep, multi-color images covering more than a quarter of...