What is Chi Cygni?
{{more sources|date=November 2018}} [[File:Red Giant Chi Cygni.png|thumb|Chi Cygni is a red giant star.]] '''Chi Cygni''' is a [[Mira]] variable [[star]] located in the [[Cygnus (constellation)|Cygnus]] constellation. It is 737 times larger than the [[Sun]].<ref>{{cite journal|url=https://www.aanda.org/articles/aa/abs/2010/15/aa13771-09/aa13771-09.html|title=Probing the mass-loss history of AGB and red supergiant stars from CO rotational line profiles - II. CO line survey of evolved stars: derivation of mass-loss rate formulae|first1=K. M.|last1=Menten|first2=F.|last2=Kemper|first3=T.|last3=Verhoelst|first4=K.|last4=Justtanont|first5=A. de|last5=Koter|first6=L.|last6=Decin|first7=E. De|last7=Beck|date=1 November 2010|journal=Astronomy & Astrophysics|volume=523|pages=A18|via=www.aanda.org|doi=10.1051/0004-6361/200913771|arxiv=1008.1083|bibcode=2010A&A...523A..18D|s2cid=16131273}}</ref> Chi Cygni is a [[red giant]] star that is about to end its life. ==References== {{reflist}} {{physics-stub}} {{sci-stub}} [[Category:Red giants]] [[Category:Variable stars]]