Andromeda (constellation)

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Andromeda is a constellation in the northern sky. It is surrounded by Perseus, Cassiopeia, Lacerta, Pegasus, Pisces and Triangulum.

(PD) Diagram: NASA
Andromeda constellation[1]
Andromeda
Latin name Andromeda
Latin genitive Andromedae
International abbreviation And
Number of stars 139
Symbology Daughter of Cassiopeia


Named stars

The brightest stars in Andromeda are α Andromedae (Alpheratz) and β Andromedae (Mirach), both of which are of apparent magnitude 2.06. The star γ And is also known as Almach.[2]

Remarkable objects

Groombridge 34 is one of the nearest double star systems known and consists of two red dwarf stars located 11.6 light years from Earth.

Andromeda also contains a number of deep-sky objects of which perhaps the best known is the Andromeda Galaxy, also known as M 31 and NGC 224, and its satellite galaxies NGC 221 (M 32) and NGC 205 (M 110). The open cluster NGC 752 is conspicuous in small optical instruments.

History and mythology

According to legend, Andromeda was a daughter of an Ethiopian king named Cepheus. She was forged to a rock to be eaten by Cetus as a punishment of her mother Cassiopeia, who had insulted the Gods by telling everybody that her daughter was more beautiful than the nymphs, the daughters of Nereus.

References

  1. Chandra X-ray Observatory/ NASA [1]
  2. Bright Star Catalogue, 5th revised edition, 1991


88 Official Constellations by IAU

AndromedaAntliaApusAquariusAquilaAraAriesAurigaBoötesCaelumCamelopardalisCancerCanes VenaticiCanis MajorCanis MinorCapricornusCarinaCassiopeiaCentaurusCepheusCetusChamaeleonCircinusColumbaComa BerenicesCorona AustralisCorona BorealisCorvusCraterCruxCygnusDelphinusDoradoDracoEquuleusEridanusFornaxGeminiGrusHerculesHorologiumHydraHydrusIndusLacertaLeoLeo MinorLepusLibraLupusLynxLyraMensaMicroscopiumMonocerosMuscaNormaOctansOphiuchusOrionPavoPegasusPerseusPhoenixPictorPiscesPiscis AustrinusPuppisPyxisReticulumSagittaSagittariusScorpiusSculptorScutumSerpensSextansTaurusTelescopiumTriangulumTriangulum AustraleTucanaUrsa MajorUrsa MinorVelaVirgoVolansVulpecula