KY Cygni
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KY Cygni is a variable red supergiant or hypergiant of spectral class M3Ia located in the constellation Cygnus. It is approximately 4,700 light-years away.
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Red supergiant
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Red supergiants are stars with a supergiant luminosity class and a stellar classification K or M. They are the largest stars in the universe in terms of volume, although they are not the most massive
KY Cygni
…KY Cygni is a variable red supergiant or hypergiant of spectral class M3Ia located in the constellation Cygnus. It is approximately 4,700 light-years away. KY Cyg lies near the bright open…
Fluid dynamics simulations of a red supergiant, with giant convection cells and puffy surface
Betelgeuse pulsating and showing spectral line profile changes (HST UV images)
Most red supergiants end their lives as a Type II supernova, such as SN2013ej at bottom left in a spiral arm of M74.
RSGC1, the first of several massive clusters found to contain multiple red supergiants.