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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). [2][5] Because of its relative proximity to the Milky Way galaxy, large size, and active galactic nucleus (which ...
The original file is very high-resolution. It might not load properly or could cause your browser to freeze when opened at full size. Description Messier 81 HST.jpg. English: The spiral galaxy Messier 81 is tilted at an oblique angle on to our line of sight, giving a "birds-eye view" of the spiral structure. The galaxy is similar to our Milky ...
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 ...
1ES 2344+514. Ton 618 (this quasar has possibly the biggest black hole ever found, estimated at 66 billion solar masses) [1] 3C 371. 4C +37.11 (this radio galaxy is believed to have binary supermassive black holes) [2] AP Lib. S5 0014+81 (said to be a compact hyperluminous quasar, estimated at 40 billion solar masses) [3]
Messier 82 (also known as NGC 3034, Cigar Galaxy or M82) is a starburst galaxy approximately 12 million light-years away in the constellation Ursa Major. It is the second-largest member of the M81 Group, with the D 25 isophotal diameter of 12.52 kiloparsecs (40,800 light-years). [1][5] It is about five times more luminous than the Milky Way and ...
The supermassive black hole at the core of Messier 87, here shown by an image by the Event Horizon Telescope, is among the black holes in this list.. This is an ordered list of the most massive black holes so far discovered (and probable candidates), measured in units of solar masses (M ☉), approximately 2 × 10 30 kilograms.
Size (left) and distance (right) of a few well-known galaxies put to scale. The following is a list of notable galaxies.. There are about 51 galaxies in the Local Group (see list of nearest galaxies for a complete list), on the order of 100,000 in the Local Supercluster, and an estimated 100 billion in all of the observable universe.
UGC 7831, [8] PGC 42408 [4] NGC 4605 is a dwarf barred spiral galaxy [6] in the constellation Ursa Major, located at a distance of 18.1 ± 0.3 megalight-years from the Milky Way. [5] Physically it is similar in size and in B-band absolute magnitude to the Large Magellanic Cloud. [6] It is a member of the M81 Galaxy Group, along with Messier 81 ...