SDSS SkyServer
Sloan Digital Sky Survey III
SkyServer DR9
DR9 Tools
 Getting Started
 Famous places
 Get images
 Scrolling sky
 Visual Tools
 Object Crossid
Data Access Tools
Getting Started tells you what types of data you can find on SkyServer, what data each of the tools will return, and how you can best use the tools to study the sky.

Famous Places presents a gallery of beautiful images, various large galaxies, and some of the most distant quasars ever discovered.

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.

Scrolling Sky lets you enjoy the sight of the sky moving on the screen as the SDSS telescope sees it when it scans along on its nightly cycle.

Visual Tools

  • 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 List is a cutout service that generates small JPEG images for up to 1000 user-provided positions on the sky.
  • Quick Look lets you view basic data for an object, such as its position, magnitude, and redshift
  • Explore lets you interactively explore the various properties of individual objects.

Search allows you to search the database for sky positions, objects with a certain brightness, and and various other criteria. You can even enter free-format SQL queries, or use a simple form to search the database.

Object Crossid allows you to do dynamic cross identifications of SDSS objects with a user defined list of object positions, 5-part SDSS object ID (consisting of run, rerun, camcol, field, obj) for photometric objects, or 3-part SDSS spectroscopic object ID (consisting of plate, MJD and fiber). You can even join a photometric object list with matching spectra (SpecObj) if you want spectroscopic information, or join a spectroscopic object list with matching photometric objects. A few simple upload formats are supported for the list of objects to cross-identify.

CasJobs allows you to submit much larger and intensive SQL queries in batch (asynchronous) mode and save query results in your own personal database (MyDB).

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.