DATABASE: Star-Studded Catalog

Science  26 Mar 2004:
Vol. 303, Issue 5666, pp. 1951e
DOI: 10.1126/science.303.5666.1951e

A mammoth astronomical atlas nearly doubled in size earlier this month. The Sloan Digital Sky Survey (NetWatch, 15 June 2001, p. 1971), which has enlisted more than 200 astronomers to chart one-fourth of the night sky, released its second trove of data. The site amasses images and measurements of position and brightness for stars, galaxies, and quasars. The update adds a further 38 million objects to the previous total of about 50 million. For more than 300,000 deep-space denizens, the site also includes data on spectrum and red shift, an indicator of distance from Earth.

www.sdss.org/DR2

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