• Thumbnail for Spiral arm
    brackets) NGC 4977 ( μ = 7 , 3 ∘ {\displaystyle \mu =7{,}3^{\circ }} ) NGC 2649 ( μ = 12 , 6 ∘ {\displaystyle \mu =12{,}6^{\circ }} ) NGC 4195 ( μ =...
    48 KB (5,520 words) - 02:32, 1 April 2025
  • Thumbnail for Andromeda Galaxy
    Andromeda Galaxy (redirect from NGC 224)
    originally named the Andromeda Nebula and is cataloged as Messier 31, M31, and NGC 224. Andromeda has a D25 isophotal diameter of about 46.56 kiloparsecs (152...
    113 KB (11,065 words) - 15:17, 19 April 2025
  • Thumbnail for Local Group
    Large Magellanic Cloud, Small Magellanic Cloud, M32, NGC 205, NGC 6822, NGC 185, IC 1613 and NGC 147. He also identified IC 10 as a possible part of the...
    51 KB (2,897 words) - 02:47, 14 April 2025
  • Thumbnail for Supermassive black hole
    mergers". Monthly Notices of the Royal Astronomical Society. 475 (4): 4967–4977. arXiv:1708.07126. Bibcode:2018MNRAS.475.4967T. doi:10.1093/mnras/sty139...
    106 KB (11,103 words) - 12:48, 24 April 2025