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Encyclopedia > Ursa Major
Ursa major
Ursa major
Click for larger image
List of stars in Ursa major
Abbreviation: UMa
Genitive: Ursae Majoris
Symbology: the Great Bear
Right ascension: 10.67 h
Declination: +55.38°
Area: 1280 sq. deg. (3rd)
Main stars: 7, 20
Bayer/Flamsteed stars: 80
Stars known to have planets: 6
Bright stars: 6
Nearby stars: 12
Brightest star: ε UMa (Alioth) (1.7124m)
Nearest star: Lalande 21185 (8.29 ly)
Messier objects: 7
Meteor showers: Alpha Ursa Majorids
Leonids-Ursids
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.


Ursa Major (pronounced /ˌɝsəˈmeɪdʒɚ/) is a constellation visible throughout the year in most of the northern hemisphere. Its name means Great Bear in Latin, and is associated with the legends of Callisto and Cynosura. The term Great Bear can refer to: Ursa Major, the constellation, whose name is the Latin for Great Bear. The Great Bear, an artwork by Simon Patterson based on the London Tube map. ... This file has been listed on Wikipedia:Images and media for deletion. ... This is the list of notable stars in the constellation Ursa Major, sorted by decreasing brightness. ... The genitive case is a grammatical case that indicates a relationship, primarily one of possession, between the noun in the genitive case and another noun. ... Equatorial Coordinates Right ascension (abbrev. ... In astronomy, declination (abbrev. ... Here is a list of the 88 modern constellations by their area in the sky, measured in square degrees. ... The tone or style of this article or section may not be appropriate for Wikipedia. ... Flamsteed designations for stars are similar to Bayer designations, except that they use numbers instead of Greek letters. ... An extrasolar planet, or exoplanet, is a planet beyond the Solar System. ... Ursa Major Epsilon Ursae Majoris (ε UMa / ε Ursae Majoris) is the brightest star in the constellation Ursa Major (despite its Bayer designation being merely epsilon), and at magnitude 1. ... The apparent magnitude (m) of a star, planet or other celestial body is a measure of its apparent brightness as seen by an observer on Earth. ... Lalande 21185 is a red dwarf star approximately 2. ... A light-year or lightyear (symbol: ly) is a unit of measurement of length, specifically the distance light travels in vacuum in one year. ... The Messier objects are a set of astronomical objects catalogued by Charles Messier in his catalogue of Nebulae and Star Clusters first published in 1774. ... A meteor shower, some of which are known as a meteor storm or meteor outburst, is a celestial event where a group of meteors are observed to radiate from one point in the sky. ... Draco (IPA: , Latin: ) is a far northern constellation that is circumpolar for many northern hemisphere observers. ... Camelopardalis, Latin for giraffe, is the name of a large but faint northern constellation first recorded by Jakob Bartsch in 1624, but probably created earlier by Petrus Plancius. ... Lynx (IPA: ) is a constellation of the northern hemisphere, introduced in the 17th century by Johannes Hevelius. ... Leo Minor (Latin for Small Lion) is a rather dim constellation that can barely be recognized as a triangle and lies between the easily discerned constellations Ursa Major and Leo. ... Leo (IPA: , Latin: , symbol , ) is a constellation of the zodiac. ... Coma Berenices (IPA: , Latin: ) is a traditional asterism that has since become a constellation. ... Canes Venatici (Latin for Hunting dogs) is a small northern constellation that was introduced by Johannes Hevelius in the 17th century. ... Boötes (IPA: Greek: herdsman) is one of the 88 modern constellations and was also one of the 48 constellations listed by Ptolemy. ... Download high resolution version (1952x672, 641 KB) Credits This is a nighttime photograph of Ursa Major (the Big Dipper). ... Big Dipper map A group of the brightest stars of the constellation Ursa Major, the Great Bear, form a well-known asterism that has been recognized as a distinct grouping in many cultures from time immemorial. ... This article is about the star grouping. ... For other uses, see Latin (disambiguation). ... In Jupiter and Callisto by François Boucher, Jupiter/Zeus takes the form of Diana/Artemis (Pushkin Museum, Moscow) This article is about the mythological figure. ... In Greek mythology, Cynosura was a nymph (an Oread) on Mount Ida, Crete. ...

Contents

Notable features

The eight brightest stars, located in the Bear's hindquarters and tail, form the well-known Big Dipper asterism. (In Britain, this asterism is known as the Plough.) Except for Dubhe and Alkaid, the stars of the Big Dipper all have proper motions heading towards a common point in Sagittarius. A few other such stars have been identified, and together they are called the Ursa Major Moving Group. This article is about the astronomical object. ... Big Dipper map A group of the brightest stars of the constellation Ursa Major, the Great Bear, form a well-known asterism that has been recognized as a distinct grouping in many cultures from time immemorial. ... In astronomy, an asterism is a pattern of stars seen in Earths sky which is not an official constellation. ... The proper motion of a star is the motion of the position of the star in the sky (the change in direction in which we see it, as opposed to the radial velocity) after eliminating the improper motions of the stars, which affect their measured coordinates but are not real... For other uses, see Sagittarius. ... The Ursa Major Moving Group, also known as Collinder 285, is the closest moving group to Earth, that is, a set of stars with common velocities in space, thought to have a common origin. ...


In addition to the Big Dipper, another asterism comes from Arab culture — the "leaps of the gazelle", a series of three pairs of stars:

  • ν and ξ Ursae Majoris, Alula Borealis and Australis, the "first leap";
  • λ and μ Ursae Majoris, Tania Borealis and Australis, the "second leap";
  • ι and κ Ursae Majoris, Talitha Borealis and Australis, the "third leap".

These stars are found along the southwest border of the constellation, the bear's toes. Nu Ursae Majoris (ν UMa / ν Ursae Majoris) is a binary star in the constellation Ursa Major. ... Xi Ursae Majoris (ξ UMa / ξ Ursae Majoris) is a star system in the constellation Ursa Major. ... Lambda Ursae Majoris (λ UMa / λ Ursae Majoris) is a star in the constellation Ursa Major. ... Mu Ursae Majoris (μ UMa / μ Ursae Majoris) is a star in the constellation Ursa Major. ... Iota Ursae Majoris (ι UMa / ι Ursae Majoris) is a star system in the constellation Ursa Major. ... Kappa Ursae Majoris (κ UMa / κ Ursae Majoris) is a binary star in the constellation Ursa Major. ...


Mizar, a star in the Big Dipper, forms the famous optical double star with Alcor. Mizar (ζ UMa) is a star in the constellation Ursa Major and is the second star from the end of the Big Dippers handle. ... When two stars are so nearly in the same direction as seen from Earth that they appear to be a single star to the naked eye but may be separated by the use of telescopes, they are referred to as a double star. ...


W Ursae Majoris is the prototype of a class of contact binary variable stars, and ranges between 7.75m and 8.48m. W Ursae Majoris (W UMa) is a variable star in the constellation Ursa Major. ... Contact binaries are a type of binary stars where both components of the binary fill their Roche lobes. ... This article or section contains a plot summary that is overly long or excessively detailed. ... The apparent magnitude (m) of a star, planet or other celestial body is a measure of its apparent brightness as seen by an observer on Earth. ...


47 Ursae Majoris has a planetary system with two confirmed planets, 2.54 times and 0.76 times the mass of Jupiter. 47 Ursae Majoris (abbreviated 47 UMa) is a 5th magnitude yellow dwarf star in the constellation of Ursa Major. ... An extrasolar planet, or exoplanet, is a planet beyond the Solar System. ... Atmospheric characteristics Atmospheric pressure 70 kPa Hydrogen ~86% Helium ~14% Methane 0. ...


Notable deep sky objects

Several bright galaxies are found in Ursa Major, including the pair Messier 81 (one of the brightest galaxies in the sky) and Messier 82 above the bear's head, and Pinwheel Galaxy (M101), a beautiful spiral northwest of η Ursae Majoris. The other notable spiral galaxies Messier 108 and Messier 109 may also be found in this other constellation. Altogether, the constellation contains about 50 galaxies observable through amateur telescope. The bright planetary nebula Owl Nebula (M97), named for its appearance, can be found along the bottom of the bowl of the Big Dipper. Of note as a curiosity more than an interesting deep sky object is Messier 40, a double star that Messier nonetheless included in his catalogue. For other uses, see Galaxy (disambiguation). ... Messier 81 (also known as NGC 3031 or Bodes Galaxy) is a spiral galaxy about 12 million light-years away in the constellation Ursa Major. ... Messier 82 (also known as NGC 3034 or the Cigar Galaxy) is a starburst galaxy about 12 million light-years away in the constellation Ursa Major. ... The Pinwheel Galaxy (also known as Messier Object 101, or NGC 5457) is a spiral galaxy in the constellation Ursa Major. ... Eta Ursae Majoris (η UMa / η Ursae Majoris) is a star in the constellation Ursa Major. ... A spiral galaxy is a type of galaxy in the Hubble sequence which is characterized by the following physical properties: Spiral Galaxy M74 presents a face-on view of its spiral arms. ... The Spiral Galaxy M108 (also known as Messier Object 108, Messier 108, M108, or NGC 3556) is a spiral galaxy in the Ursa Major constellation. ... The Spiral Galaxy M109 (also known as Messier Object 109, Messier 109, M109, or NGC 3992) is a spiral galaxy in the Ursa Major constellation. ... It has been suggested that this article or section be merged with Skygazing. ... This article does not cite any references or sources. ... NGC 6543, The Cats Eye Nebula NGC 6853, The Dumbbell Nebula A planetary nebula is an astronomical object consisting of a glowing shell of gas and plasma formed by certain types of stars at the end of their lives. ... The Owl Nebula (also known as Messier Object 97 or NGC 3587) is a planetary nebula in the constellation Ursa Major. ... Winnecke 4 (also known as Messier Object 40 or WNC 4) is a double star in the constellation Ursa Major. ... When two stars are so nearly in the same direction as seen from Earth that they appear to be a single star to the naked eye but may be separated by the use of telescopes, they are referred to as a double star. ...


The Hubble Deep Field is located to the northeast of δ Ursae Majoris. The Hubble Deep Field The Hubble Deep Field (HDF) is the result of a series of observations by the Hubble Space Telescope of a small region of the northern celestial hemisphere. ... Megrez is the star Delta Ursae Maioris. ...


Ursa Major was one of the 48 constellations listed by Ptolemy. It is one of the most widely-known constellations, having been mentioned by such poets as Homer, Spenser, Shakespeare, Tennyson and Bertrand Cantat. The Finnish epic Kalevala mentions it, and Vincent Van Gogh painted it upside down. This article is about the geographer, mathematician and astronomer Ptolemy. ... For other uses, see Homer (disambiguation). ... This article or section does not cite any references or sources. ... Wikipedia does not yet have an article with this exact name. ... Lord Tennyson, Poet Laureate Alfred Tennyson, 1st Baron Tennyson (August 6, 1809 - October 6, 1892) is generally regarded as one of the greatest English poets. ... Bertrand Cantat (born in Pau, France, March 5, 1964) is a French singer and songwriter. ... The Kalevala is an epic poem which the Finn Elias Lönnrot compiled from Finnish and Karelian folklore in the 19th century. ... van Gogh redirects here. ...


Graphic visualisation

  • Hevelius' work depicts an attempt to represent the constellation as a bear.
    The drawing Hevelius made of Ursa Major. The drawing is made as if being viewed from outside the celestial sphere.
    The drawing Hevelius made of Ursa Major. The drawing is made as if being viewed from outside the celestial sphere.

Johannes Hevelius Johannes Hevelius or Johann Hewelke or Johannes Hewel (German) or Jan Heweliusz (Polish) (January 28, 1611-January 28, 1687) was an astronomer; called the founder of lunar topography. ... Image File history File links Download high resolution version (994x812, 120 KB) Johannes Hevelius drew the Ursa Major constellation in Uranographia, his celestial catalogue in 1690. ... Image File history File links Download high resolution version (994x812, 120 KB) Johannes Hevelius drew the Ursa Major constellation in Uranographia, his celestial catalogue in 1690. ... Johannes Hevelius Johannes Hevelius (Latin), also called Johann Hewelke, Johannes Höwelcke or Johannes Hewel (in German), or Jan Heweliusz (in Polish), (born January 28, 1611 – died January 28, 1687), was a councillor and mayor in Danzig (Gdańsk). ... van Gogh redirects here. ... Starry Night over the Rhone (1888) is one of Vincent van Goghs famous paintings of Arles at night. ...

See also

Ursa Minor (IPA: ) is a constellation in the northern sky, the name of which means Smaller Bear in Latin. ...

References

  • Ian Ridpath and Wil Tirion (2007). Collins Stars and Planets Guide, HarperCollins, London. ISBN 978-0007251209.

External links

Wikimedia Commons has media related to:
Ursa Major

  Results from FactBites:
 
HOME (418 words)
Welcome to Ursa Major Theatre's site, which gives you information about our current and upcoming productions.
Ursa Major was founded in 1993 in London, soon after its artistic director, John Longebaugh, graduated from the Central School of Speech and Drama’s directing course.
In addition, we co-sponsored with the Northwest Playwrights Guild a long-running bi-weekly playreading workshop, which ran from mid-1996 to late 1999.
Ursa Major information - Search.com (817 words)
Ursa Major (Ursa Maior in Latin) is a constellation visible throughout the year in the northern hemisphere.
W Ursae Majoris is the prototype of a class of contact binary variable stars, and ranges in magnitude between 7.75m and 8.48m.
In earlier times, Greek mythology did not consider Ursa Major a bear, and instead its 3 bright stars (situated in the tail) were seen as apples growing on a tree (sometimes represented by the fainter stars in the remainder of the constellation).
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