Welcome to SkyServer!
This site gives you access to all the data from the Sloan Digital Sky Survey (SDSS). Here, you will learn how to use exactly the same tools that professional astronomers use.
Use the links below or in the left-hand column to go to a page in the Support section.
Overview is this page, containing an index of what Support pages are available.
About the Data gives an overview of the catalog archive.
Schema Browser shows you what data you can find in the database.
Sample Queries are many real-life examples of useful SQL queries.
SQL in SkyServer contains more detailed information about SQL, including advice making your queries run fast.
Query Advice provides some practical advice on how to search SDSS data.
APIs contains information on how to programatically access some of the SDSS services.
SQL Tutorial is an introduction to Structured Query Language (SQL), its scientific uses, and its syntax, hosted on a previous version of the SkyServer site.
Contact gives instructions on how to contact the SkyServer and SDSS helpdesks with questions.