M31, NGC 224, UGC 454, PGC 2557, 2C 56 (Core),[1] CGCG 535-17, MCG +07-02-016, IRAS 00400+4059, 2MASX J00424433+4116074, GC 116, h 50, Bode 3, Flamsteed 58, Hevelius 32, Ha 3.3, IRC +40013
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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 D25 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 mythology.[8]
The virial mass of the Andromeda Galaxy is of the same order of magnitude as that of the Milky Way, at 1 trillion solar masses (2.0×1042 kilograms). The mass of either galaxy is difficult to estimate with any accuracy, but it was long thought that the Andromeda Galaxy was more massive than the Milky Way by a margin of some 25% to 50%.[11] This has been called into question by early 21st-century studies indicating a possibly lower mass for the Andromeda Galaxy[11]
and a higher mass for the Milky Way.[12][13] The Andromeda Galaxy has a diameter of about 46.56 kpc (152,000 ly), making it the largest member of the Local Group of galaxies in terms of extension.[13]
The Milky Way and Andromeda galaxies are expected to collide with each other in around 4–5 billion years,[14] merging to potentially form a giant elliptical galaxy[15] or a large lenticular galaxy.[16]
With an apparent magnitude of 3.4, the Andromeda Galaxy is among the brightest of the Messier objects,[17] and is visible to the naked eye from Earth on moonless nights,[18] even when viewed from areas with moderate light pollution.[8]
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^ abcdDe Vaucouleurs, Gerard; De Vaucouleurs, Antoinette; Corwin, Herold G.; Buta, Ronald J.; Paturel, Georges; Fouque, Pascal (1991). Third Reference Catalogue of Bright Galaxies. Bibcode:1991rc3..book.....D.
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^López-Corredoira, M.; Prieto, C. Allende; Garzón, F.; Wang, H.; Liu, C.; Deng, L. (1 April 2018). "Disk stars in the Milky Way detected beyond 25 kpc from its center". Astronomy & Astrophysics. 612: L8. arXiv:1804.03064. Bibcode:2018A&A...612L...8L. doi:10.1051/0004-6361/201832880 – via www.aanda.org.
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The AndromedaGalaxy 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...
most of which are dwarf galaxies. The two largest members, the Andromeda and the Milky Way galaxies, are both spiral galaxies with masses of about 1012...
with relatively large galaxies. According to recent studies, the Milky Way as well as the AndromedaGalaxy lie in what in the galaxy color–magnitude diagram...
known simply as galaxies. Millions of galaxies have been catalogued, but only a few have well-established names, such as the AndromedaGalaxy, the Magellanic...
the Triangulum Galaxy is the third-largest member of the Local Group of galaxies, behind the AndromedaGalaxy and the Milky Way. The galaxy is the second-smallest...
mythology Andromeda (constellation), a region of the Earth's night sky The AndromedaGalaxy, an astronomical object within the constellation Andromeda may also...
Spaceknight #1) are an evolutionary offshoot of the Skrulls from the AndromedaGalaxy. Like the Skrulls, the Wraiths are shapeshifters where they are able...
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...
Georges; Maeder, Andre (September 2009). "Red Supergiants in the AndromedaGalaxy (M31)". The Astrophysical Journal. 703 (1): 420–440. arXiv:0907.3767...
after the Big Bang) The AndromedaGalaxy is approximately 2.5 million light years away from our galaxy, the Milky Way galaxy, and they are moving towards...
The Pegasus Dwarf Spheroidal (also known as Andromeda VI or Peg dSph for short) is a dwarf spheroidal galaxy about 2.7 million light-years away in the constellation...
"early-type" galaxy about 2,650,000 light-years (810,000 pc) from the Solar System, appearing in the constellation Andromeda. M32 is a satellite galaxy of the...
they are supposedly given away for free in the AndromedaGalaxy, the end of the line for the Galaxy Express 999, a space train that only comes to Earth...
including galaxies beyond the Milky Way. The AndromedaGalaxy, for instance, was once referred to as the Andromeda Nebula (and spiral galaxies in general...
a dwarf elliptical galaxy that is a satellite of the AndromedaGalaxy in the Local Group. Charles Messier never included the galaxy in his list, but it...
the Sun, with the most distant at a few thousand parsecs, and the AndromedaGalaxy at over 700,000 parsecs. The word parsec is a portmanteau of "parallax...
galaxies Pegasus Dwarf Spheroidal Galaxy or Pegasus II, a member of the Local Group of galaxies, a satellite of the AndromedaGalaxy Pegasus Galaxy (Stargate)...
suspected. AndromedaGalaxy – Barred spiral galaxy in the Local Group Milky Way – Galaxy containing the Solar System Pinwheel Galaxy – Galaxy in the constellation...
Andromeda II (And II) is a dwarf spheroidal galaxy about 2.22 Mly away in the constellation Pisces. While part of the Local Group, it is not quite clear...
the nearby AndromedaGalaxy currently appear to be undergoing the quenching transition from star-forming blue galaxies to passive red galaxies. Dark energy...
Andromeda I is a dwarf spheroidal galaxy (dSph) about 2.40 million light-years away in the constellation Andromeda. Andromeda I is part of the local group...
depicts a war between the Reapers and the rest of the galaxy. A fourth game, Mass Effect: Andromeda (2017), featured a new setting and cast of characters...
Boschin, Walter (2022). "Pegasus V/Andromeda XXXIV–a newly discovered ultrafaint dwarf galaxy on the outskirts of Andromeda". Monthly Notices of the Royal...
Also of note is the "Absence"—the mysterious disappearance of the AndromedaGalaxy. Large-scale human civilizations almost invariably seem to collapse...