|Cooking with Sloan|
|Query Form Guide|
|SQL in SkyServer|
|Sample SQL Queries|
|Contact Help Desk|
Welcome to SkyServer! This site gives you access to all the data from the Sloan Digital Sky Survey (SDSS).
You are now viewing data from the Sloan Digital Sky Survey's Data Release 4. (link opens in a new window)
Use the links below, or the links to the left, to go to a help page:
Site News lists the latest changes to the interface and data on this SkyServer site.
Introduction to SkyServer gives you a quick overview of SDSS catalog data, and how to use the data
Cooking with Sloan consists of guides for doing common tasks with SDSS catalog data
FAQ is frequently asked questions about the SDSS and its data
Guide to Searching for Data
Form Query User Guide provides help on using the Imaging and Spectroscopic Query Form pages
SQL tutorial is an introduction to Structured Query Language (SQL), its scientific uses, and its syntax
Using SQL with SkyServer contains more detailed information about SQL, including advice making your queries run fast
Sample SQL Queries are many real-life examples of useful SQL queries
Query Limits lists the timeouts and row limits in effect for the various query tools.
Searching advice provides some practical advice on how to search SDSS data
Important Reference Information
Archive Intro gives an overview of the archive
Table Description provides a description of the database tables
Schema Browser shows you what data you can find in the database
Glossary is a list of terms used on the site and in the SDSS
Algorithms describes the SDSS's data reduction algorithms
Web Browsers shows what parts of the site are supported by which web browsers
Known Problems lists known problems on this SkyServer site and in the SDSS data.
Detailed Reference Information
Download lets you download selected papers and tools
SDSS Data Publications is a link to publications that describe the SDSS data in more detail
API contains information on how to programatically access some of the SDSS services
SkyServer Sites lists the various SkyServer websites and physical locations, including mirror sites
Contact Help Desk allows you to send an email to the SDSS Help Desk if you have a question or problem with the site