NGC 17, also known as NGC 34, is a spiral galaxy in the constellationCetus. It is the result of a merger between two disk galaxies, resulting in a recent starburst in the central regions and continuing starforming activity. The galaxy is still gas-rich, and has a single galactic nucleus. It lies 250 million light years away. It was discovered in 1886 by Frank Muller and then observed again later that year by Lewis Swift.
The central regions of NGC 17 have a spiral structure.
Due to the major merger event NGC 17 has no defined spiral arms like the Milky Way galaxy. Unlike the Milky Way, the center bar nucleus is also distorted.[2] The merger destroyed any galactic habitable zone that may have been there before the merger.[3][4] For the Milky Way, the galactic habitable zone is commonly believed to be an annulus with an outer radius of about 10 kiloparsecs and an inner radius close to the Galactic Center, both of which lack hard boundaries.[3]
Number in the New General Catalogueedit
NGC 17 and NGC 34 were catalogued by Frank Muller and Lewis Swift, respectively, in 1886. A difference of half a degree in positioning between the two men's observations meant that when John Dreyer created the New General Catalogue he listed them as separate objects.[5] In 1900 Herbert Howe noticed the discrepancy; Dreyer included the update in the second edition of the NGC in 1910.[6]
Referencesedit
^ abcdefghi"NASA/IPAC Extragalactic Database". Results for NGC 17. Retrieved 2006-12-07.
^Futurism, futurism.com, Astronomy Photo of the Day: 10/2/15 — NGC 34
^ abGowanlock, M. G.; Patton, D. R.; McConnell, S. M. (2011). "A Model of Habitability Within the Milky Way Galaxy". Astrobiology. 11 (9): 855–873. arXiv:1107.1286. Bibcode:2011AsBio..11..855G. doi:10.1089/ast.2010.0555. PMID 22059554. S2CID 851972.
^Choi, Charles Q. (21 August 2015). "Giant Galaxies May Be Better Cradles for Habitable Planets". Space.com. Retrieved 24 August 2015.
^"New General Catalog Objects: NGC 1 - 49". cseligman.com. Retrieved 6 January 2017.
^Dreyer, J.L.E. (1910). "Second Index Catalogue of Nebulæ and Clusters of Stars, containing objects found in the years 1895 to 1907; with Notes and Corrections to the New General Catalogue and to the Index Catalogue for 1888-94". Memoirs of the Royal Astronomical Society. 59: 186. Bibcode:1910MmRAS..59..105D.
External linksedit
Media related to NGC 17 at Wikimedia Commons
April 05, 2024
also, known, spiral, galaxy, constellation, cetus, result, merger, between, disk, galaxies, resulting, recent, starburst, central, regions, continuing, starforming, activity, galaxy, still, rich, single, galactic, nucleus, lies, million, light, years, away, di. NGC 17 also known as NGC 34 is a spiral galaxy in the constellation Cetus It is the result of a merger between two disk galaxies resulting in a recent starburst in the central regions and continuing starforming activity The galaxy is still gas rich and has a single galactic nucleus It lies 250 million light years away It was discovered in 1886 by Frank Muller and then observed again later that year by Lewis Swift NGC 17NGC 17 as seen by the Hubble Space TelescopeObservation data J2000 epoch ConstellationCetusRight ascension00h 11m 06 5s 1 Declination 12 06 26 1 Redshift0 019617 1 Heliocentric radial velocity5 881 2 km s 1 Apparent magnitude V 15 3 1 CharacteristicsTypeSc 1 Apparent size V 2 2 0 8 1 Other designationsNGC 34 1 Mrk 938 VV 850 PGC 781 1 The central regions of NGC 17 have a spiral structure Due to the major merger event NGC 17 has no defined spiral arms like the Milky Way galaxy Unlike the Milky Way the center bar nucleus is also distorted 2 The merger destroyed any galactic habitable zone that may have been there before the merger 3 4 For the Milky Way the galactic habitable zone is commonly believed to be an annulus with an outer radius of about 10 kiloparsecs and an inner radius close to the Galactic Center both of which lack hard boundaries 3 Number in the New General Catalogue editNGC 17 and NGC 34 were catalogued by Frank Muller and Lewis Swift respectively in 1886 A difference of half a degree in positioning between the two men s observations meant that when John Dreyer created the New General Catalogue he listed them as separate objects 5 In 1900 Herbert Howe noticed the discrepancy Dreyer included the update in the second edition of the NGC in 1910 6 References edit a b c d e f g h i NASA IPAC Extragalactic Database Results for NGC 17 Retrieved 2006 12 07 Futurism futurism com Astronomy Photo of the Day 10 2 15 NGC 34 a b Gowanlock M G Patton D R McConnell S M 2011 A Model of Habitability Within the Milky Way Galaxy Astrobiology 11 9 855 873 arXiv 1107 1286 Bibcode 2011AsBio 11 855G doi 10 1089 ast 2010 0555 PMID 22059554 S2CID 851972 Choi Charles Q 21 August 2015 Giant Galaxies May Be Better Cradles for Habitable Planets Space com Retrieved 24 August 2015 New General Catalog Objects NGC 1 49 cseligman com Retrieved 6 January 2017 Dreyer J L E 1910 Second Index Catalogue of Nebulae and Clusters of Stars containing objects found in the years 1895 to 1907 with Notes and Corrections to the New General Catalogue and to the Index Catalogue for 1888 94 Memoirs of the Royal Astronomical Society 59 186 Bibcode 1910MmRAS 59 105D External links edit nbsp Media related to NGC 17 at Wikimedia Commons Retrieved from https en wikipedia org w index php title NGC 17 amp oldid 1162393579, wikipedia, wiki, book, books, library,
