enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Messier 81 - Wikipedia

    en.wikipedia.org/wiki/Messier_81

    Messier 81 (also known as NGC 3031 or Bode's Galaxy) is a grand design spiral galaxy about 12 million light-years away in the constellation Ursa Major. It has a D 25 isophotal diameter of 29.44 kiloparsecs (96,000 light-years ).

  3. Cosmic distance ladder - Wikipedia

    en.wikipedia.org/wiki/Cosmic_distance_ladder

    The cosmic distance ladder (also known as the extragalactic distance scale) is the succession of methods by which astronomers determine the distances to celestial objects. A direct distance measurement of an astronomical object is possible only for those objects that are "close enough" (within about a thousand parsecs ) to Earth.

  4. List of nearest galaxies - Wikipedia

    en.wikipedia.org/wiki/List_of_nearest_galaxies

    This is a list of known galaxies within 3.8 megaparsecs (12.4 million light-years) of the Solar System, in ascending order of heliocentric distance, or the distance to the Sun. This encompasses about 50 major Local Group galaxies, and some that are members of neighboring galaxy groups , the M81 Group and the Centaurus A/M83 Group , and some ...

  5. File:Messier 81 HST.jpg - Wikipedia

    en.wikipedia.org/wiki/File:Messier_81_HST.jpg

    Main page; Contents; Current events; Random article; About Wikipedia; Contact us

  6. M81 Group - Wikipedia

    en.wikipedia.org/wiki/M81_Group

    The M81 Group is a galaxy group in the constellations Ursa Major and Camelopardalis that includes the galaxies Messier 81 and Messier 82, as well as several other galaxies with high apparent brightnesses. [1] The approximate center of the group is located at a distance of 3.6 Mpc, making it one of the nearest groups to the Local Group. [1]

  7. Messier 87 - Wikipedia

    en.wikipedia.org/wiki/Messier_87

    The image shows a slight rotation in the vertical plane (the lower right moving toward earth, the upper left moving away), showing that M87 is rotating slowly. [51] [52] M87 is one of the most massive galaxies in the local Universe. Its diameter is estimated at 132,000 light-years, which is approximately 51% larger than that of the Milky Way.

  8. Orders of magnitude (length) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude_(length)

    18 Tm – 123.5 AUdistance between the Sun to the farthest dwarf planet in the Solar System, the Farout 2018 VG18; 20.0 Tm – 135 AUdistance to Voyager 1 as of May 2016; 20.6 Tm – 138 AUdistance to Voyager 1 as of late February 2017; 21.1 Tm – 141 AUdistance to Voyager 1 as of November 2017

  9. Astronomical system of units - Wikipedia

    en.wikipedia.org/wiki/Astronomical_system_of_units

    The term "unit distance" is also used for the length A while, in general usage, it is usually referred to simply as the "astronomical unit", symbol au. An equivalent formulation of the old definition of the astronomical unit is the radius of an unperturbed circular Newtonian orbit about the Sun of a particle having infinitesimal mass, moving ...