编辑“︁A1689-zD1”︁

{{expand|time=2015-3-7}}
{{Infobox galaxy
| name               = '''A1689-zD1'''
| image              = [[File:A1689-zD1.jpg|400px]]
| caption            = 
| credit             = 
| epoch              = 
| constellation name = [[室女座]]
| ra                 = {{RA|13|11|29.9}} 
| dec                = {{DEC|-01|19|19}}
| z                  = 7.6
| h_radial_v         = 
| gal_v              = 
| dist_ly            = 129.7亿[[光年]]（3978.5M[[秒差距|pc]]）
| group_cluster      = [[阿貝爾1689]]
| type               = 
| mass               = <!-- In solar masses, i.e.: 2{{e|13}} {{Solar mass|link=y}} -->
| stars              = 
| appmag_v           = 
| size_v             = 
| notes              = 
| names              = BBF2008 A1689-zD1
| references         = 
}}

'''A1689-zD1'''是已知距離最遙遠和最古老的[[星系]]之一，它在2008年2月被发现<ref name="nasa">{{cite web
  | title = Astronomers Eye Ultra-Young, Bright Galaxy in Early Universe
  | publisher = nasa.gov
  | date = 2008-02-12
  | url = http://www.nasa.gov/centers/jpl/news/Spitzer20080212.html
  | accessdate = 2008-02-25
  | archive-date = 2016-03-18
  | archive-url = https://web.archive.org/web/20160318184254/http://www.nasa.gov/centers/jpl/news/Spitzer20080212.html
  | dead-url = no
  }}</ref><ref name="nasa2">{{cite web
  | title = Astronomers Uncover One of the Youngest and Brightest Galaxies in the Early Universe
  | publisher = Space Telescope Science Institute Baltimore, Md. / [[美国国家航空航天局|nasa]].gov
  | date = 2008-02-12
  | url = http://www.nasa.gov/mission_pages/hubble/science/young_bright.html
  | accessdate = 2008-02-25
  | archive-date = 2008-02-17
  | archive-url = https://web.archive.org/web/20080217204728/http://www.nasa.gov/mission_pages/hubble/science/young_bright.html
  | dead-url = no
  }}</ref>。

因为其128億光年的遥远距离，和高達～7.6的[[红移|红移量]]<ref name="esa">{{cite web
|1= 
|title= heic0805: Hubble finds strong contender for galaxy distance record
|publisher= [[欧洲空间局|ESA]]/Hubble
|date= 2008-02-12
|url= http://www.spacetelescope.org/news/html/heic0805.html
|accessdate= 2008-04-04
|archive-date= 2008-03-08
|archive-url= https://web.archive.org/web/20080308003313/http://www.spacetelescope.org/news/html/heic0805.html
|dead-url= no
}}</ref>，使此星系抵達地球的微弱光線主要是[[紅外線]]。因此，它是通过[[哈勃|哈勃太空望远镜]]的[[近紅外線照相機和多目標分光儀]]以及[[斯皮策太空望遠鏡]]的紅外線陣列相機利用[[引力透镜效应|引力透镜]]現象发现的：横亙在地球和A1689-zD1之間，距離我們22億光年的[[星系團]][[阿貝爾1689]]，如同放大鏡般的將正後方更遙遠處的星系放大并扭曲。在[[大爆炸]]之後約7億年，其光線增強，才能在地球處被看見<ref name="nasa"/>。

==相關條目==
* [[IOK-1]]
* [[UDFy-38135539]]
* [[最遙遠的天體列表]]

== 參考資料 ==
<references/>


{{-}}
{{恆星系統}}
{{星系}}
{{室女座}}

[[Category:室女座]]
[[Category:遥远星系]]
[[Category:重力透鏡]]