Sloan Digital Sky Survey SkyServer SDSS Data Release 2 (DR2)

The Sloan Digital Sky Survey released its second Data Release (DR2) in March 2004. DR2 is about 1.5 times the size of DR1 in spatial coverage. The photometric data in DR2 are based on five-band imaging observations of 3324 square degrees of sky, and include measures of 88 million unique objects.
Based on these photometric data, objects were selected for spectroscopy to a surface density of about 120 extragalactic candidates per square degree. DR2 includes these spectra, with derived spectroscopic parameters, for over 295,000 galaxies and quasars. Details of the Data Release 2 can be found at http://www.sdss.org/dr2/