SkyServer brings you the entire public database of the Sloan Digital Sky Survey - over 80 million stars, galaxies, and quasars - free of charge. The site includes a variety of Tools to view and download SDSS data, and Projects that let you use these data to learn science. Teachers, you are welcome to use and adapt our projects in your classes - click here to find out how.
SkyServer is currently hosting the SDSS's Data Release 4 (DR4). For more information on the data, see the About SDSS section. For technical details on how SkyServer works, follow one of the links below:
Site Map gives you a diagram of SkyServer's web tree
SkyServer Paper is a technical report (to be published soon) that describes SkyServer's web site, database structure, content, and usage
Web Services describes how SkyServer uses web services, with links to endpoints and to some sample applications
Site Traffic tracks hits to the SkyServer site since April 29, 2003
skyserver.org is a new support site for SkyServer that includes information on how to build your own version of the site