• Thumbnail for NGC 2903
    NGC 2903 is an isolated barred spiral galaxy in the equatorial constellation of Leo, positioned about 1.5° due south of Lambda Leonis. It was discovered...
    10 KB (846 words) - 00:20, 3 December 2023
  • Thumbnail for NGC 2950
    NGC 2950 is a lenticular galaxy in the northern constellation of Ursa Major, about 50 million light years from the Milky Way and receding with a heliocentric...
    9 KB (501 words) - 21:01, 21 October 2023
  • Thumbnail for NGC 71
    NGC 71 is an elliptical galaxy located in the constellation Andromeda. It is in the NGC 68 group. The galaxy was discovered by R. J. Mitchell in 1855...
    4 KB (162 words) - 10:52, 28 November 2023
  • Thumbnail for NGC 2803
    NGC 2803, also known as PCG 26181, is an elliptical or lenticular galaxy in the zodiac constellation Cancer. It was discovered March 21, 1784, by William...
    3 KB (199 words) - 17:51, 18 January 2024
  • Thumbnail for Rydberg atom
    Bibcode:2015PhRvA..91c0301K. doi:10.1103/physreva.91.030301. ISSN 1050-2947. S2CID 118859994. Friedler, Inbal; Petrosyan, David; Fleischhauer, Michael;...
    51 KB (5,769 words) - 19:59, 11 July 2024
  • Thumbnail for VY Canis Majoris
    that of the stars, which are members of the open cluster NGC 2362, that ionize the rim. NGC 2362 could be anywhere in the ranges of 1.5±0.5 kiloparsecs...
    67 KB (6,889 words) - 18:14, 15 July 2024
  • Thumbnail for Intermediate-mass black hole
    the technique of reverberation mapping. For instance, the spiral galaxy NGC 4395 at a distance of about 4 Mpc appears to contain a black hole with mass...
    26 KB (2,995 words) - 04:20, 14 July 2024
  • Thumbnail for NGC 2509
    NGC 2509 is an open cluster in the constellation of Puppis. It was discovered on 3 December 1783 by William Herschel. It was described as "bright, pretty...
    3 KB (286 words) - 21:06, 28 June 2023
  • Thumbnail for NGC 2800
    NGC 2800, also known as PGC 26302, is an elliptical galaxy in the constellation Ursa Major. It was discovered February 17, 1831 by William Herschel. Skrutskie...
    3 KB (190 words) - 20:24, 12 August 2023
  • Thumbnail for 28 Cygni
    19475+3119 IRAS 20324+4057 Kronberger 61 M1-92 NGC 6826 NGC 6881 NGC 6884 NGC 7008 NGC 7026 NGC 7027 NGC 7048 Soap Bubble Nebula WR Crescent Nebula SNR...
    10 KB (802 words) - 03:33, 28 November 2023