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Andromeda and Triangulum constellations from Urania's Mirror, 1825
Constellations of Andromeda and Triangulum (lower right) from Urania's Mirror (c. 1825) by Richard Rouse Bloxam. The constellation Gloria Frederici (upper left) is now part of Andromeda.
Andromeda
constellation
Andromeda, in astronomy, constellation of the northern sky at about one hour right ascension and 40Ā° north declination. The brightest star, Alpheratz (from the Arabic for āhorseās navelā; the star was once part of the constellation Pegasus), has a magnitude of 2.1. Its most notable feature is the great Andromeda Galaxy, one of the nearest galaxies to Earth and one of the few galaxies visible to the unaided eye. Andromeda is named after the princess of Ethiopia whom, according to Greek mythology, the hero Perseus saved from sacrifice to the sea monster Cetus.
The Editors of Encyclopaedia BritannicaThis article was most recently revised and updated by Rick Livingston.
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