Astronomy Data

International Astronomical Union (IAU): Central Bureau for Astronomical Telegrams

International Astronomical Union (IAU): Central Bureau for Astronomical Telegrams
IAU: Minor Planet Center (MPC)
International Comet Quarterly (ICQ) Comet Information

US Naval Observatory

NASA Astronomical Data Center

NASA Astrophysics Data System

NASA/IPAC Extragalactic Database

NASA/IPAC Extragalactic Database
A Knowledgebase for Extragalactic Astronomy and Cosmology
Capabilities of the NASA/IPAC Extragalactic Database in the Era of a Global Virtual Observatory

Space Telescope Science Institute (STScI)

Canadian Astronomy Data Center (CADC)

Center de Dommees Astronomiques de Strasbourg (CDS)

European Southern Observatory (ESO) and Space Telescope Science Archive Facilities

National Astronomical Observatory of Japan