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The Andromeda Galaxy is a barred spiral galaxy and is the nearest major galaxy to the Milky Way. It was originally named the Andromeda Nebula and is cataloged as Messier 31, M31, and NGC 224. Andromeda has a D 25 isophotal diameter of about 46.56 kiloparsecs (152,000 light-years) [8] and is
It was considered to be the brightest variable star in M31. [ 9 ] [ 10 ] Two years later it was given the variable star designation AF Andromedae. [ 11 ] Between 1917 and 1953, five or six major eruptions were detected and two or three minor ones.
The Andromeda Galaxy with M110 at upper left and M32 to the right of the core. The Andromeda Galaxy (M31) has satellite galaxies just like the Milky Way. Orbiting M31 are at least 13 dwarf galaxies: the brightest and largest is M110, which can be seen with a basic telescope. The second-brightest and closest one to M31 is M32. The other galaxies ...
Known as the M31 Galaxy, Andromeda is the closest spiral galaxy to our own Milky Way, located about 2.5 million light-years away. It contains over a trillion stars, and is one of the few galaxies ...
Messier 32 (also known as M32 and NGC 221) is a dwarf "early-type" galaxy about 2,490,000 light-years (760,000 pc) from the Solar System, appearing in the constellation Andromeda. M32 is a satellite galaxy of the Andromeda Galaxy (M31) and was discovered by Guillaume Le Gentil in 1749.
Andromeda II is a dwarf spheroidal galaxy about 2.22 Mly away in the constellation Andromeda. It is part of the Local group of galaxies and is a satellite galaxy of the Andromeda Galaxy (M31) but it is also situated closely to the Triangulum Galaxy (M33), it is not quite clear if it is a satellite of the one or the other galaxy.
The most famous deep-sky object in Andromeda is the spiral galaxy cataloged as Messier 31 (M31) or NGC 224 but known colloquially as the Andromeda Galaxy for the constellation. [54] M31 is one of the most distant objects visible to the naked eye, 2.2 million light-years from Earth (estimates range up to 2.5 million light-years). [ 55 ]
At that time it was the brightest stellar object in M31 and maintained a similar brightness for about 20 years. [ 7 ] Early in the investigations leading to the definition of LBVs, AE And was identified as similar to the five Hubble–Sandage variables : Var A, Var B, Var C, and Var 2 in M33, and Var 19 in M31 (=AF Andromedae).