Created by William Keel of the University of Alabama, this site offers a large amount of information concerned with Seyfert galaxies, radio galaxies, and Quasars. Under each topic are about a dozen links to images with...

This site is an astronomy tutorial posted by Gene Smith, a professor at UC San Diego. The site contains information on quasars and active galaxies. Information is included on gravitational lensing, black holes, and...

This website, from the National Radio Astronomy Observatory (NRAO), is an image gallery of the enormous mass at the center of the Milky Way galaxy. Each image is accompanied by a several-paragraph explanation. Links to...

This Sloan Digital Sky Survey (SDSS) project teaches students how to detect asteroids using the pictures taken by the survey. The first asteroid was discovered in 1801 by Giuseppe Piazzi, and since then many more have...

This website provides the user with basic, and important, information about galaxies. it first introduces the Hubble Tuning Fork Diagram, by proposing the creation of a galaxy classification system. Then it explains the...