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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 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 group is estimated to have a total mass of (1.03 ± 0.17) × 10 12 M ☉ . [ 2 ]
M81 is a nearly face-on spiral galaxy 11.8 million light-years from Earth. Like most spiral galaxies, it has a core made up of old stars, with arms filled with young stars and nebulae. Along with M82, it is a part of the galaxy cluster closest to the Local Group. M82 is a nearly edgewise galaxy that is interacting gravitationally with M81.
z p = 10.8 +0.3 −0.2: ... 2.6 AU when Mars is diametrically opposed to Earth ... Earth in relation to the distance of the Moon from the Earth. The distance to the ...
It is a member of the M81 Group [4] and lies 1° 20 ′ to the southwest of Messier 81. [11] The projected separation of this galaxy from the M81 Group is 190 kpc. [6] The morphological classification of this galaxy is SAa, [7] which matches an unbarred spiral galaxy (SA) with very tightly-wound spiral arms (a). The actual visual form of the ...
[7] [8] [9] 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]
This is because the distance between Earth and the Sun is not fixed (it varies between 0.983 289 8912 and 1.016 710 3335 au) and, when Earth is closer to the Sun , the Sun's gravitational field is stronger and Earth is moving faster along its orbital path. As the metre is defined in terms of the second and the speed of light is constant for all ...