The Second Data Release of the Sloan Digital Sky Survey

The Sloan Digital Sky Survey has validated and made publicly available its Second Data Release. This data release consists of 3324 square degrees of five-band (u g r i z) imaging data with photometry for over 88 million unique objects, 367,360 spectra of galaxies, quasars, stars and calibrating blank sky patches selected over 2627 degrees of 31 Enrico Fermi Institute, The University of Chicago, 5640 S. Ellis Ave., Chicago, IL 60637 32 Lawrence Berkeley National Laboratory, One Cyclotron Rd., Berkeley CA 94720-8160 33 Center for Astrophysics and Space Astronomy, University of Colorado, Boulder, CO 80309 34 Astronomy Centre, University of Sussex, Falmer, Brighton BN1 9QJ, United Kingdom 35 Department of Physics and Astrophysics Nagoya University Chikusa, Nagoya 464-8602, Japan 36 SNS-4, MS H820, Los Alamos National Laboratory, Los Alamos, NM 87545 37 Department of Physics, University of Michigan, 500 East University Ave., Ann Arbor, MI 48109 38 Institute for Astronomy Royal Observatory Blackford Hill Edinburgh EH9 3HJ Scotland 39 Department of Physics, University of Pennsylvania, Philadelphia, PA 19104 40 Department of Physics, Applied Physics, and Astronomy, Rensselaer Polytechnic Institute, Troy, NY 12180 41 CMC Electronics Aurora 43W752 Route 30 Sugar Grove, IL 60554 Department of Astronomy and Research Center for the Early Universe, School of Science, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan 43 Joseph Henry Laboratories, Princeton University, Princeton, NJ 08544 44 Physics Department, Rochester Institute of Technology, 84 Lomb Memorial Drive, Rochester, NY 14623-5603 45 Department of Astronomy and Astrophysics, the Pennsylvania State University, University Park, PA 16802 46 Japan Participation Group, c/o Institute for Cosmic Ray Research, University of Tokyo, 5-1-5 Kashiwa-no-Ha, Kashiwa City, Chiba 277-8582, Japan University of Zagreb, Department of Physics, Bijenička cesta 32, 10000 Zagreb, Croatia 48 Institute for Astronomy, 2680 Woodlawn Road, Honolulu, HI 96822 49 University of Wyoming, Dept. of Physics & Astronomy, Laramie, WY 82071 50 Adler Planetarium and Astronomy Museum 1300 Lake Shore Drive Chicago, IL 60605 51 Max-Planck-Institut für extraterrestrische Physik, Giessenbachstrasse 1, D-85741 Garching, Germany 52 Carnegie Observatories 813 Santa Barbara St. Pasadena, CA 91101 53 Department of Physics, Drexel University, Philadelphia, PA 19104 54 Department of Astronomy, Ohio State University, Columbus, OH 43210 55 Max Planck Institute for Astrophysics, Karl Schwarzschildstrasse 1, D-85748 Garching, Germany 56 Code 7215, Remote Sensing Division Naval Research Laboratory 4555 Overlook Ave SW Washington, DC 20392