Tags: Star.

Mu Cephei (μ Cep μ Cephei) also known as Herschel’s Garnet Star is a red supergiant star in the constellation Cepheus. It is one of the largest and most luminous stars known in the Milky Way. It appears garnet red and is given the spectral class of M2 Ia. Since 1943 the spectrum of this star has served as one of the stable anchor points by which other stars are classified.

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