Astronomical Applications Department, U.S. Naval Observatory  
Computes the position, brightness, and other observable characteristics of celestial bodies, as well as the circumstances of astronomical phenomena. Includes information on calendars and related topics.

The Naming of Stars  
Leaflet from Royal Greenwich Observatory.

Australia Astro Site  
Extensive resources for astronomy.

Eric Weisstein's World of Astronomy 
A web encyclopedia. Over 500 entries, ranging from definitions to full articles.

AstroWeb  
Astronomical Internet resources by the Space Telescope Science Institute.

Astronomy Education and Outreach 
General astronomy tutorial, education links, web courses, documents at the UCSD Center for Astrophysics and Space Sciences.

Infrared Astronomy 
All about infrared astronomy from NASA's infrared astronomy center: Discovery of infrared, what is infrared and infrared astronomy, history, the infrared universe, gallery, activities, discoveries, missions and a lot of links to IR astronomy sites.

Space.com - The Greatest Myths, Hoaxes & Mysteries in Astronomy and Space Science  
Article briefly discussing 21 topics.

Absolute Astronomy 
Facts and statistical information about planets, moons, constellations, stars, galaxies, and Messier objects.

An Atlas of the Universe  
Contains 3D maps of the universe zooming out from the nearest stars to the scale of the galaxy and out to the surrounding superclusters and finally to the scale of the known universe.