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OpenStudy (anonymous):

how do stars in the upper left of the main sequence of the HR diagram differ from the stars in the lower right end

OpenStudy (anonymous):

its actually talking about the luminosity, the temperature/colour and size of a star normally, for the temperature/ colour (Kelvin temperature), the stars would be classify into O, B, A, F, G, K, M O=bluish (hottest) M=reddish (relatively colder)

rebeccaxhawaii (rebeccaxhawaii):

WELCOME TO OS any ideas?

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