Astronomy: Reference

Established 1899, AAS is the major organization of professional astronomers in North America.

Founded in 1919, IAU's mission is to promote and safeguard the science of astronomy in all its aspects through international cooperation.

The ASP has become the largest general astronomy society in the world, and works to increases the understanding and appreciation of astronomy by engaging scientists, educators, enthusiasts and the public to advance science and science literacy.

More than 400 webpages and about 8000 links to external documents.

A network of free online resource collections supporting faculty, students, and teachers in Physics and Astronomy Education.

Create a color image of any planet or satellite as seen from any point in the Solar System.

Accurate, up-to-date, and comprehensive information on Program activities, accomplishments, and plans and the institutions, organizations, and people involved in the astrobiology enterprise worldwide.

A comprehensive physics and astronomy online education, research and reference web site. In addition to providing high-quality content, PhysLink.com is a meeting place for professionals, students and other curious minds.

A gateway to government science information and research results.

A wide range of astronomical data and products, including astrometry, astronomical applications, Earth orientation, precise time, etc.

A vivid multimedia adventure unfolding the splendor of the Sun, planets, moons, comets, asteroids, and more.

This list of astronomical resource sites is intended as a resource for users who have a general interest in astronomical topics.

Interactive planetarium of the Web