What is KY Cygni?
[[File:KY Cygni.gif|thumb|Sizes of [[Betelgeuse]] and KY Cygni]] '''KY Cygni''' is a [[Red supergiant|red star]] in the [[Cygnus (constellation)|Cygnus constellation]].<ref>{{cite web |title=KY Cygni |work=Universe Guide |access-date=9 July 2018 |url=https://www.universeguide.com/star/kycygni}}</ref> It is one of the largest stars known<ref>{{cite web |title=Supergiants |url=https://www.sciencedaily.com/terms/supergiant.htm |work=ScienceDailly |access-date=9 July 2018}}</ref> and with a radius about {{convert|1420 - 1503|solar radius|au|abbr=on|lk=on|}}. If it was placed at the center of the [[Solar System]], it would extend past the orbit of [[Jupiter]] (or [[Saturn]]). It is also one of the [[List of most luminous stars|most luminous stars]], with about 300,000 or more times the Sun's [[luminosity]]. It is about 5,000 [[light-years]] away. ==References== {{reflist}} [[Category:Red giants]] [[Category:Variable stars]] [[Category:Stars]] {{physics-stub}}