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Spectral Classes OBAFGKM
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Astronomy
AST.185 Spectral Classes OBAFGKM
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Red dwarf stars, the small cool main-sequence stars common in the galaxy, are usually in which spectral class?
A
Class O: very hot and massive blue stars
B
Class M: cool red main-sequence stars are red dwarfs
C
Class A: white stars with strong Balmer lines
D
Class B: hot blue-white stars with helium lines
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