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	Welcome to DR4!!!   This website presents data from the Sloan Digital Sky Survey, a project to make a map of a large part of the universe. We would like to show you the beauty of the universe, and share with you our excitement as we build the largest map in the history of the world.	News   The site hosts data from Data Release 4 (DR4). What's new in DR4, what's new on this site, and known problems. More...	For Astronomers   A separate branch of this website for professional astronomers (English)   More...

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	Welcome to the DR4 Catalog Archive Server with restricted access for the SDSS Collaboration only. The following databases are available BESTDR4 The best version photo (imaging), spectro and tiling data		News This site contains data from Data Release 4 (DR4). Please see the Site News page, What's New in DR4 page and the Known Problems page for more information.    To run a query on one of the DR4 DBs other than BESTDR4, name the database explicitly in the query: SELECT TOP 100 * FROM TARGDR4..PhotoObj   WHERE r<17 and r-i>2

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