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Was wondering, how would an astronomer know if the color of a star's illumination is caused by the temperature of a star (hot ones glow blue and cooler ones glow red) or caused by red or blue shifting due to Doppler Effect

UNITED STATES / SEP 29, 2018 2:29 PM EST



hahahaha omg is the light refraction meme! wow so funny! i'm loling in the floor! omg! top post! so funny !

UNITED STATES / SEP 29, 2018 11:41 PM EST
Yes

GERMANY / SEP 29, 2018 3:34 PM EST
Yes

UNITED STATES / SEP 29, 2018 2:44 PM EST