 Simbad Astronomical Database |  ATCA Data Archival |  Astronomical Data Center |
 HST Archival Data |  GRS-data |  NRAO Data Archive System |
 Accesses to Astronomical atalogues |  Dictionary of Nomenclature of Celestial Objects |  NASA/IPAC Extragalactic Database |
 The Sloan Digital Sky Survey |  Canadian Astronomy Data Centre |  Aladin Sky Atlas |
 VizieR Service | |  database for Astronomical Spectroscopy |