11-484: M83 or M-83 may refer to: Astronomy [ edit ] Messier 83 , a spiral galaxy in the constellation Hydra M83 Group , a group of galaxies centered around Messier 83 Military [ edit ] M-83, a Soviet M-class submarine M83 smoke grenade M83 submunition , a US copy of the German Butterfly Bomb of World War II; used in
22-704: The Local Group . By contrast, a starburst galaxy is an entire galaxy that is experiencing a very high star formation rate. One notable example is Messier 82 in which the gas pressure is 100 times greater than in the local neighborhood, and it is forming stars at about the same rate as the entire Milky Way in a region only about 600 parsecs (2,000 ly) across. At this rate M82 will consume its 200 million solar masses of atomic and molecular hydrogen in 100 million years (its free-fall time ). Starburst regions can occur in different shapes, for example in Messier 94
33-649: The Southern Pinwheel Galaxy and NGC 5236 , is a barred spiral galaxy approximately 15 million light-years away in the constellation borders of Hydra and Centaurus . Nicolas-Louis de Lacaille discovered M83 on 17 February 1752 at the Cape of Good Hope . Charles Messier added it to his catalogue of nebulous objects (now known as the Messier Catalogue ) in March 1781. It is one of
44-603: The 'SAB' denotes a weak-barred spiral, '(s)' indicates a pure spiral structure with no ring, and 'c' means the spiral arms are loosely wound. The peculiar dwarf galaxy NGC 5253 lies near M83, and the two likely interacted within the last billion years resulting in starburst activity in their central regions. The star formation rate in M83 is higher along the leading edge of the spiral arms, as predicted by density wave theory . NASA 's Galaxy Evolution Explorer project on 16 April 2008 reported finding large numbers of new stars in
55-504: The M29 cluster bomb Music [ edit ] M83 (band) , an electronic band named after the galaxy of the same name M83 (album) , the debut album of the M83 music group Roads and routes [ edit ] M-83 (Michigan highway) , a state highway in Michigan [REDACTED] Topics referred to by the same term This disambiguation page lists articles associated with
66-612: The closest and brightest barred spiral galaxies in the sky, and is visible with binoculars . It has an isophotal diameter at about 36.24 kiloparsecs (118,000 light-years ). Its nickname of the Southern Pinwheel derives from its resemblance to the Pinwheel Galaxy (M101). M83 is a massive, grand design spiral galaxy . Its morphological classification in the De Vaucouleurs system is SAB(s)c, where
77-408: The galaxies around Centaurus A and the galaxies around M83 are physically close to each other, and both subgroups appear not to be moving relative to each other. Starburst region A starburst region is a region of space that is undergoing a large amount of star formation . A starburst is an astrophysical process that involves star formation occurring at a rate that is large compared to
88-546: The high amount of star formation a starburst is usually accompanied by much higher gas pressure and a larger ratio of hydrogen cyanide to carbon monoxide emission-lines than are usually observed. Starbursts can occur in entire galaxies or just regions of space. For example, the Tarantula Nebula is a nebula in the Large Magellanic Cloud which has one of the highest star formation rates in
99-572: The outer reaches of the galaxy— 20 kpc from the center. It had been thought that these areas lacked the materials necessary for star formation . Six supernovae have been observed in M83: M83 is at the center of one of two subgroups within the Centaurus A/M83 Group , a nearby galaxy group . Centaurus A is at the center of the other subgroup. These are sometimes identified as one group, and sometimes as two. However,
110-424: The rate that is typically observed. This starburst activity will consume the available interstellar gas supply over a timespan that is much shorter than the lifetime of the galaxy. For example, the nebula NGC 6334 has a star formation rate estimated to be 3600 solar masses per million years compared to the star formation rate of the entire Milky Way of about seven million solar masses per million years. Due to
121-534: The same title formed as a letter–number combination. If an internal link led you here, you may wish to change the link to point directly to the intended article. Retrieved from " https://en.wikipedia.org/w/index.php?title=M83&oldid=958539543 " Category : Letter–number combination disambiguation pages Hidden categories: Short description is different from Wikidata All article disambiguation pages All disambiguation pages Messier 83 Messier 83 or M83 , also known as
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