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Messier 81 is the largest galaxy in the M81 Group, a group of 34 in the constellation Ursa Major. [28] At approximately 11.7 Mly (3.6 Mpc ) from the Earth, it makes this group and the Local Group , containing the Milky Way , [ 28 ] relative neighbors in the Virgo Supercluster .
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 ...
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]
The proper distance provides a measurement of how far a galaxy is at a fixed moment in time. At the present time the proper distance equals the comoving distance since the cosmological scale factor has value one: a ( t 0 ) = 1 {\displaystyle a(t_{0})=1} .
seen from 1 AU away would be over 2 × 10 16 (20 quadrillion) times as bright as the Sun when seen from the Earth −43.27 star NGC 2403 V14: seen from 1 AU away −41.82 star NGC 2363-V1: seen from 1 AU away −41.39 star Cygnus OB2-12: seen from 1 AU away −40.67 star M33-013406.63: seen from 1 AU away −40.17 star η Carinae A seen from 1 ...
Also called VV 32 and Arp 148, this is a very peculiar looking object, and is likely to be not one galaxy, but two galaxies undergoing a collision. Event in images is a spindle shape and a ring shape. [citation needed] Milky Way: Sagittarius (centre) The appearance from Earth of the galaxy—a band of light [citation needed]
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 ).
Andromeda has a D 25 isophotal diameter of about 46.56 kiloparsecs (152,000 light-years) [8] and is approximately 765 kpc (2.5 million light-years) from Earth. The galaxy's name stems from the area of Earth's sky in which it appears, the constellation of Andromeda, which itself is named after the princess who was the wife of Perseus in Greek ...