• Thumbnail for Atlas of Peculiar Galaxies
    galaxies, including M51 (Arp 85), Arp 220, and the Antennae Galaxies (NGC 4038/NGC 4039, or Arp 244). A few of the galaxies are simply dwarf galaxies that...
    72 KB (4,868 words) - 19:21, 18 January 2025
  • Astronomical Database unless otherwise noted. Lists of astronomical objects List of NGC objects Collinder catalogue Lyon-Meudon Extragalactic Database Melotte catalogue...
    47 KB (422 words) - 19:31, 15 January 2025
  • Thumbnail for Megamaser
    of megamaser discovered. The first water megamaser was found in 1979 in NGC 4945, a galaxy in the nearby Centaurus A/M83 Group. The first hydroxyl megamaser...
    40 KB (4,758 words) - 08:55, 20 May 2024
  • Thumbnail for IC 2233
    Observations of Superthin Galaxies. II. IC 2233 and the Blue Compact Dwarf NGC 2537". The Astronomical Journal. 135 (1): 291–318. arXiv:0709.4249. Bibcode:2008AJ...
    3 KB (212 words) - 02:18, 21 June 2021