General Databases

• AstroWeb : Links to Astronomy on the Internet
• Astro-ph : electronic preprint archive
• ADS : Smithsonian/NASA Astrophysics Data System
• NED : NASA Extragalactic Database
• ADC : Astronomical Data Center at the Astronomy Department at the University of Maryland
• IRSA : NASA Infrared Science Archive
• CDS (SIMBAD, Aladin) ·

Galaxies and Cosmology

• List of Catalogues of Galaxies
• SDSS : Sloan Digital Sky Survey
  • SDSS DR7 : Photometry
  • SDSS DR7 DAS FITS spektra in bulk
  • SDSS CAS SQL search
• APM Galaxy Survey   APM Catalog
• DENIS : Deep Near Infrared Survey of the Southern Sky
• FIRST : Faint Images of the Radio Sky at Twenty-centimeters
• NRAO VLA Sky Survey (NVSS)
• DPOSS : Digitized Palomar Observatory Sky Survey
• DSS : Digital Sky Survey
• RASS : ROSAT All Sky Survey
• 2MASS : Two Micron All Sky Survey at IPAC   Data access   CDS VizieR for 2MASS

Redshift of Galaxies

• ZCAT : Redshift Catalogs of Galaxies
• IRAS PSCz Galaxy Redshift Survey
• 2dF GRS : 2 degree Field Galaxy Redshift Survey
• 6dF GS : 6 degree Field Galaxy Survey

Clusters of Galaxies

• Abell G.O. Abell. The Distribution of Rich Clusters of Galaxies. Astrophysical Journal Supplement Series, 3:211 (1958).
• Zwicky: Zwicky, F. A catalogue of galaxies and clusters of galaxies,1961- 1968.
• RCG: Catalogue of Rich Clusters of Galaxies
  Abell, Corwin, Olowin 1989; Centre de Donnees Stellaires, Strasbourg, France. ( also Astrophysical Journal Supplement Series, 70, 1, 1989).
• A compilation of redshifts and velocity dispersions for ACO clusters of galaxies (ZACO).
  Andernach, H., Tago, E. 2007 (in preparation)
• ADC Galaxy Groups and Clusters Data Reference

Constants and Units

• Constants and Units (ADC)