• Thumbnail for R Doradus
    R Doradus (HD 29712 or P Doradus) is a red giant variable star in the far-southern constellation Dorado, close to the border with Reticulum. Its distance...
    16 KB (1,325 words) - 22:01, 12 September 2024
  • Thumbnail for Betelgeuse
    Betelgeuse (redirect from H. R. 2061)
    Earth-observed angular diameter of Betelgeuse is exceeded only by those of R Doradus and the Sun. Starting in October 2019, Betelgeuse began to dim noticeably...
    174 KB (18,522 words) - 03:33, 17 September 2024
  • Thumbnail for Dorado
    Dorado (redirect from Doradus)
    of S Doradus variable stars. The variable star R Doradus 5.73 has the largest-known apparent size of any star other than the Sun. Gamma Doradus is the...
    13 KB (1,473 words) - 23:42, 2 July 2024
  • Thumbnail for S Doradus
    S Doradus was still uncertain, considered possibly to be a pre-main-sequence star, but during the next decade the consensus settled on the S Doradus type...
    28 KB (3,188 words) - 11:54, 31 August 2024
  • Thumbnail for Tarantula Nebula
    Tarantula Nebula (redirect from 30 Doradus)
    The Tarantula Nebula (also known as 30 Doradus) is a large H II region in the Large Magellanic Cloud (LMC), forming its south-east corner (from Earth's...
    14 KB (1,290 words) - 16:55, 22 June 2024
  • Thumbnail for Minute and second of arc
    from the Sun, the star with the largest angular diameter from Earth is R Doradus, a red giant with a diameter of 0.05″. Because of the effects of atmospheric...
    27 KB (3,338 words) - 06:41, 9 July 2024
  • Thumbnail for List of largest stars
    lower temperatures but with radii reaching up to many tens of thousands of R☉, comparable to some of the largest known black holes. The angular diameters...
    235 KB (10,236 words) - 10:01, 15 September 2024
  • Thumbnail for Arcturus
    a near-infrared J band magnitude of −2.2, only Betelgeuse (−2.9) and R Doradus (−2.6) are brighter. The lower output in visible light is due to a lower...
    53 KB (5,320 words) - 15:41, 21 August 2024
  • Thumbnail for Angular diameter
    distance D, expressed in arcseconds, is given by: δ = 206 , 265   ( d / D )   a r c s e c o n d s {\displaystyle \delta =206,265~(d/D)~\mathrm {arcseconds}...
    26 KB (1,863 words) - 05:39, 23 August 2024
  • point source in most observations (the largest angular diameter, that of R Doradus, is 0.057 ± 0.005 arcsec), whereas a galaxy may extend over several arcseconds...
    9 KB (1,079 words) - 17:33, 23 August 2024