These tools give you many different ways of looking at our data.

CrossId allows you to upload search the database for sky positions, objects with a a list of object positions, and returns the SDSS objects which are within a certain radius of those positions. A few simple upload formats are supported.

SpecList allows you to upload search the database for spectra with a list of plate, MJD and fiber numbers, and returns the SDSS objects matching those parameters as well as a SQL query that you can enter.

Finding Chart returns a JPEG image centered on (ra,dec), of size (height x width) where the image is scaled to an arbitrary scale (scale). Various drawing options can be specified (opt).

Navigate lets you interactively navigate the sky, by clicking and zooming.

Image Lists is a cutout service that generates small JPEG images for up to 1000 user-provided positions on the sky.

Explore lets you interactively explore the various properties of individual objects.

Get Images lets you download of individual images and spectra at various zoom levels. Go here if you want to save a nice picture for a screen background.

Help is provided for those who would like to understand more about these tools, using SQL, and the properties of the objects stored in our database.

Download contains a few publications which explain our data in much more detail, and a few tools that can be ran on the user's computer, like the sdssQA, an advanced query tool written in Java.