Link a Database Astronomici - Link to Astronomical databases
CDS - Centre de Données astronomiques de Strasbourg
Chandra X-ray Observatory (AXAF)
ESO Science Archive Facility
ESO online Digitized Sky Survey
EUVE archive
HEASARC - High Energy Astrophysics Science Archive Research Center - NASA
HyperLeda - Database for physics of galaxies
ISDC - Integral Science Data Center
IUE - International Ultraviolet Explorer
LEDAS - Digitized Sky Survey
NASA/IPAC - Extragalactic Database
SIMBAD - Query by identifiers