|
}}</ref> menunjukkan bahwa [[gugus bola]] terbesar di Bima Sakti, [[Omega Centauri]], sebenarnya adalah inti dari sebuah galaksi katai dengan [[lubang hitam]] di pusatnya, yang dahulu pernah diserap oleh Bima Sakti.
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== Jenis-jenis umum galaksi katai==
* [[EllipticalGalaksi galaxyeliptis]]: [[dwarfGalaksi ellipticaleliptis galaxykatai]] (dE)
* [[Galaksi sferoid katai]] (dSph): Dulu merupakan subjenis dari galaksi eliptis katai, sekarang dianggap sebagai jenis tersendiri.
* [[Dwarf spheroidal galaxy]] (dSph): Once a subtype of dwarf ellipticals, now regarded as a distinct type
* [[IrregularGalaksi galaxytak beraturan]]: [[IrregularGalaksi galaxytak beraturan|dwarfGalaksi tak irregularberaturan galaxykatai]] (dI)
* [[SpiralGalaksi galaxyspiral]]: [[dwarfGalaksi spiral galaxykatai]] (dS) <ref name="schombertetal1995">{{cite journal
| author=J. M. Schombert, R. A. Pildis, J. A. Eder, A. Oelmer, Jr.
| title=Dwarf Spirals
| bibcode=1995AJ....110.2067S
| doi=10.1086/117669}}</ref>
* [[MagellanicGalaksi spiral Magellan|MagellanicGalaksi katai typetipe dwarfsMagellan]]
* Galaksi katai kompak biru (lihat [[Galaksi katai#Galaksi katai kompak biru|bagian di bawah ini]])
* Blue compact dwarf galaxies (see [[Dwarf_galaxy#Blue_compact_dwarf_galaxies|section below]])
* Galaksi katai ultra kompak (lihat [[Galaksi katai#Galaksi katai ultra kompak|bagian di bawah ini]])
* Ultra-compact dwarf galaxies (see [[Dwarf_galaxy#Ultra-compact_dwarfs|section below]])
* "HobbitGalaksi galaxieshobbit" — The recently coined termIstilah '''hobbitgalaksi galaxyhobbit''' hasbaru-baru ini digunakan untuk merujuk beenpada usedgalaksi toyang describelebih galaxieskecil smallerdan andlebih dimmerredup thandari dwarfgalaksi galaxieskatai.<ref>[http://www.space.com/scienceastronomy/070115_mm_hobbit_galaxies.html New 'Hobbit' Galaxies Discovered Around Milky Way]. SPACE.com (2007-01-15). Retrieved on 2012-02-03.</ref><ref>[http://sciencenow.sciencemag.org/cgi/content/full/2007/109/1 Hobbits in Space – ScienceNOW]. Sciencenow.sciencemag.org. 9 January 2007. Retrieved on 2012-02-03.</ref>
==Galaksi katai kompak biru==
==Blue compact dwarf galaxies==
[[Image:NGC 1705.jpg|thumb|200px|[[NGC 1705]], acontoh nearbygalaksi examplekatai ofkompak abiru blueyang compact dwarf galaxydekat. ImageGambar from thedari [[HubbleTeleskop SpaceAngkasa TelescopeHubble]].]]
InDalam [[astronomyastronomi]], a '''bluegalaksi compactkatai dwarfkompak galaxybiru''' ('''BCDBlue galaxy'compact dwarf'', BCD) is aadalah smallsebuah [[galaxygalaksi]] whichkecil containsyang largememiliki [[Star_clusterGugus bintang|clustersgugus-gugus]] ofbesar young,yang hot,berisi massivebintang [[star]]smuda berukuran raksasa dan bersuhu tinggi. TheseBintang-bintang stars,paling theterang brightestdalam ofgugus-gugus whichtersebut areberwarna blue,biru causeyang themenyebabkan galaxygalaksi itselftersebut toterlihat appearberwarna [[bluebiru]] in colour.<ref>{{cite web|title=WISE Discovers Baby Galaxies in the Nearby Universe|url=http://scinerds.tumblr.com/post/14662945476/wise-discovers-baby-galaxies-in-the-nearby|work=Wide-Field Infrared Explorer|publisher=U.C. Berkeley|accessdate=3 September 2011|date=September 2, 2011}}</ref> MostKebanyakan galaksi BCD galaxiesjuga aredigolongkan also classified as dwarfsebagai [[Irregulargalaksi galaxy|irregulartak galaxiesberaturan]] orkatai asatau dwarfsebagai [[lenticulargalaksi galaxy|lenticular galaxieslentikular]] katai. BecauseKarena theyterdiri aredari composedgugus-gugus of star clustersbintang, BCD galaxiesterlihat lacktidak a uniform shapeseragam. TheyBCD consumemengkonsumsi gas intenselydengan cepat, whichyang causesmenyebabkan their stars tobintang-bintangnya becomemenjadi verysangat violentganas whensaat formingterbentuk.
Galaksi BCD mendingin dalam proses [[Pembentukan bintang|pembentukan bintang-bintang baru]]. Bintang-bintang galaksi tersebut semuanya terbentuk dalam periode waktu yang berbeda-beda, jadi galaksi tersebut memiliki waktu untuk mendingin dan menumpuk materi untuk membentuk bintang baru. Seiring dengan waktu, formasi bintang ini mengubah bentuk galaksi.
BCD galaxies cool in the process of [[Star_formation|forming new stars]]. The galaxies' stars are all formed at different time periods, so the galaxies have time to cool and to build up matter to form new stars. As time passes, this star formation changes the shape of the galaxies.
NearbyContoh-contoh examplesterdekat includemisalnya [[NGC 1705]], [[NGC 2915]] and [[NGC 3353]].<ref>
{{cite web
|author=Angel R. Lopez-Sanchez, Barbel Koribalski, Janine van Eymeren, Cesar Esteban, Attila Popping, and John Hibbard
|bibcode=1994AJ....107.2021M
}}</ref>
{{commons category|Blue compact dwarf galaxies}}
==Ultra-compact dwarfs==
<!--'''Ultra-compact dwarf''' galaxies (UCD) are a recently discovered class of very compact galaxies with very high stellar populations. They are thought to be on the order of 200 light years across, containing about 100 million stars.<ref>Anglo-Australian Observatory [http://www.aao.gov.au/press/mini_galaxies.html Astronomers discover dozens of mini-galaxies] 0100 AEST Friday 2 April 2004</ref> It is theorised that these are the cores of nucleated dwarf elliptical galaxies that have been stripped of gas and outlying stars by [[Galactic_tide|tidal interactions]], travelling through the hearts of rich clusters.<ref>{{cite arxiv|class=astro-ph|eprint=astro-ph/0307362|author1=Stelios Kazantzidis|author2=Ben Moore|author3=Lucio Mayer|title=Galaxies and Overmerging: What Does it Take to Destroy a Satellite Galaxy?|year=2003}}</ref> UCDs have been found in the [[Virgo Cluster]], [[Fornax Cluster]], [[Abell 1689]], [[Coma Cluster]], amongst other clusters.<ref>{{cite journal|author1=Mieske|author2=Infante|author3=Benitez|author4=Coe|author5=Blakeslee|author6=Zekser|author7=Ford|author8=Broadhurst|author9=Illingworth|title=Ultra Compact Dwarf galaxies in Abell 1689: a photometric study with the ACS|doi=10.1086/423701|year=2004|journal=The Astronomical Journal|volume=128|issue=4|pages=1529–1540|arxiv=astro-ph/0406613|bibcode = 2004AJ....128.1529M }}</ref>-->
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== Daftar sebagian galaksi katai==
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