Ursa Major

Ursa Major

Constellation
List of stars in Ursa Major
Abbreviation	UMa
Genitive	Ursae Majoris
Pronunciation	/ˌɜːrsə ˈmeɪdʒər/ UR-sə MAY-jər, genitive /ˌɜːrsiː məˈdʒɔːrɪs/ UR-see mə-JOR-iss
Symbolism	the Great Bear
Right ascension	10.67h
Declination	+55.38°
Quadrant	NQ2
Area	1280 sq. deg. (3rd)
Main stars	7, 20
Bayer/Flamsteed stars	93
Stars with planets	21
Stars brighter than 3.00m	7
Stars within 10.00 pc (32.62 ly)	8
Brightest star	Alioth (ε UMa) (1.76m)
Messier objects	7
Meteor showers	Alpha Ursae Majorids Kappa Ursae Majorids October Ursae Majorids
Bordering constellations	Draco Camelopardalis Lynx Leo Minor Leo Coma Berenices Canes Venatici Boötes
Visible at latitudes between +90° and −30°. Best visible at 21:00 (9 p.m.) during the month of April. The Big Dipper or Plough

Ursa Major, also known as the Great Bear, is a constellation in the northern sky, whose associated mythology likely dates back into prehistory. Its Latin name means "greater (or larger) bear", referring to and contrasting it with nearby Ursa Minor, the lesser bear.^[1] In antiquity, it was one of the original 48 constellations listed by Ptolemy in the 2nd century AD, drawing on earlier works by Greek, Egyptian, Babylonian, and Assyrian astronomers.^[2] Today it is the third largest of the 88 modern constellations.

Ursa Major is primarily known from the asterism of its main seven stars, which has been called the "Big Dipper", "the Wagon", "Charles's Wain", or "the Plough", among other names. In particular, the Big Dipper's stellar configuration mimics the shape of the "Little Dipper". Two of its stars, named Dubhe and Merak (α Ursae Majoris and β Ursae Majoris), can be used as the navigational pointer towards the place of the current northern pole star, Polaris in Ursa Minor.

Ursa Major, along with asterisms it contains or overlaps, is significant to numerous world cultures, often as a symbol of the north. Its depiction on the flag of Alaska is a modern example of such symbolism.

Ursa Major is visible throughout the year from most of the Northern Hemisphere, and appears circumpolar above the mid-northern latitudes. From southern temperate latitudes, the main asterism is invisible, but the southern parts of the constellation can still be viewed.