These sites have information about observatories and planetariums. Find out how observatories help scientists learn more about space and how planetariums help non-scientists understand the universe. Take virtual tours and view photographs of these places. Also includes information about telescopes. There are links to eThemes Resources on constellations and planets.
This is the official site of the U.S. Naval Observatory, which has many duties, including determining the precise time. Click on "About USNO" to learn more. Click on the picture to see an enlarged view.
View many illustrations of constellations. Learn how they were named and other historical information. Find out what phases the stars go through. Also learn about associated Roman and Greek mythology. Includes quizzes and a movie.
These sites are about the solar system and its nine planets. Includes facts and photographs of the planets. Learn about the various climates and structures. There are links to eThemes resources on revolution and rotation, the earth's moon, and space exploration.