M-type supergiants

Betelgeuse is a red supergiant star in the equatorial constellation of Orion. It is usually the tenth-brightest star in the night sky and, after Rigel, the second brightest in its constellation. It is a distinctly reddish, semiregular variable star whose apparent magnitude, varying between +0.0 and +1.6, with a main period near 400 days, has the widest range displayed by any first-magnitude star. Betelgeuse is the brightest star in the night sky at near-infrared wavelengths. Its Bayer designation is ', Latinised to Alpha Orionis and abbreviated Alpha Ori or '.

Antares is the brightest star in the constellation of Scorpius. It has the Bayer designation α Scorpii, which is Latinised to Alpha Scorpii. Often referred to as "the heart of the scorpion", Antares is flanked by σ Scorpii and τ Scorpii near the center of the constellation. Distinctly reddish when viewed with the naked eye, Antares is a slow irregular variable star that ranges in brightness from an apparent visual magnitude of +0.6 down to +1.6. It is on average the fifteenth-brightest star in the night sky. Antares is the brightest and most evolved stellar member of the Scorpius–Centaurus ass

red hypergiant in the constellation Canis Major

red supergiant star in the constellation Scutum

stars with a supergiant luminosity class

binary star in the constellation Cepheus

star in the constellation Cepheus

red hypergiant star in the constellation of Cygnus

red hypergiant star in the constellation Dorado, possibly the largest well-defined star known by radius

red supergiant

multiple star system in the constellation Hercules

Supergiant star possibly within the open cluster Stephenson 2

star in the constellation Cygnus

star in the constellation Cepheus

star

red supergiant

red supergiant

variable star in the constellation Taurus

variable star in the constellation Perseus

red supergiant star in the constellation Scorpius

star in the constellation Auriga

variable star in the constellation Taurus

pulsating variable star in the constellation Scutum

type of giant star showing maser emissions

star in the constellation Cassiopeia

M31-RV is a possible red cataclysmic variable star located in the Andromeda Galaxy (M31) that experienced an outburst in 1988, which was similar to the outburst V838 Monocerotis experienced in 2002. At peak brightness, M31-RV was the most luminous red supergiant in the Local Group. Such objects have been called luminous red novae or intermediate-luminosity red transients. During the outburst, both V838 Mon and M31-RV reached a maximum absolute visual magnitude of -9.8.

star in the constellation Auriga

star in the constellation Cygnus

star in the constellation Carina

star in the constellation Cygnus

star in the constellation Gemini

star in the constellation Carina

star in the constellation Cygnus

star in the constellation Cassiopeia

star in the constellation Perseus

red supergiant star

star in the constellation Tucana

star in the constellation Carina

star in the constellation Carina

star in the constellation Lacerta

variable star in the constellation Cepheus

star in the constellation Cepheus

star in the constellation Cepheus

star in the constellation Gemini

star

star in the constellation Dorado

variable star in the constellation Lacerta

red supergiant star in the constellation Carina

red supergiant star

star in the constellation Ara

star in the constellation Cepheus