编辑“︁HE 1523-0901”︁

[[File:He1523a.jpg|thumb|艺术家笔下的HE 1523-0901]]
{{Starbox short
 | name=HE 1523-0901
 | epoch=[[J2000]]
 | constell=[[天秤座]]
 | 星官= 否
 | ra={{RA|15|26|01.2}} 
 | dec={{DEC|-9|11|38}}
 | appmag_v=11.1 <ref name="AnthonyA">{{cite web|url=http://www.perseus.gr/Astro-Star-Oldest-HE-1523-0901.htm|title=Oldest Star Image Gallery|publisher=Anthony Ayiomamitis|accessdate=2008-02-20|archive-date=2008-12-11|archive-url=https://web.archive.org/web/20081211183038/http://perseus.gr/Astro-Star-Oldest-HE-1523-0901.htm|dead-url=no}}</ref>
 | absmag_v=
 | dist_ly=~7500 <ref name="AnnaF">{{cite web |url=http://www.as.utexas.edu/~anna/he1523.html |title=Homepage of Anna Frebel |publisher=Anna Frebel |accessdate=2008-02-20 |deadurl=yes |archiveurl=https://web.archive.org/web/20081204114303/http://www.as.utexas.edu/~anna/he1523.html |archivedate=2008-12-04 }}</ref>
 | dist_pc=~2,300 <ref name="AnnaF" />
 | spectral=
 | names=
}}
'''HE 1523-0901'''是一颗位于[[天秤座]]的[[红巨星]]，它在[[银河系]]内，距离地球大约7500[[光年]]。它被认为是一颗[[金属量#第二星族星|第二星族星]]（或贫金属星）为目前发现年龄最老的[[恒星]]（[Fe/H] = −2.95）。它的質量為太陽的0.8倍。通过[[欧洲南方天文台]]的[[甚大望远镜]]测量出为132亿年，而[[宇宙]]年龄大约为137亿年。

這顆恆星也是人們首次透過量度元素[[鈾]]、[[釷]]等衰變，而推算其年齡。

== 參考資料 ==
{{Reflist}}
*{{cite web|url=http://www.itwire.com/science-news/space/12098-astronomers-discover-he-1523-star-almost-as-old-as-universe|title=Astronomers discover HE 1523-0901 star: Almost as old as universe|publisher=iTWire|accessdate=2007-05-15|archive-date=2011-08-13|archive-url=https://web.archive.org/web/20110813050824/http://www.itwire.com/science-news/space/12098-astronomers-discover-he-1523-star-almost-as-old-as-universe|dead-url=no}}
*{{cite web|url=http://www.msnbc.msn.com/id/18612697/|title=Ancient star nearly as old as the universe|publisher=MSNBC.com|accessdate=2007-05-14|archive-date=2007-05-13|archive-url=https://web.archive.org/web/20070513020018/http://www.msnbc.msn.com/id/18612697/|dead-url=no}}

== 外部链接 ==
*[http://tech.sina.com.cn/d/2007-05-14/07091504405.shtml 银河系发现132亿岁最古老恒星 几乎与宇宙同龄]{{Wayback|url=http://tech.sina.com.cn/d/2007-05-14/07091504405.shtml |date=20070902125203 }}

{{天文小作品}}

[[Category:紅巨星]]
[[Category:第二星族星]]
[[Category:天秤座]]
[[Category:恒星]]