a star with a radius of 12 that of the sun but a surface temperature of 0.5 times that of the sun be more or less luminous than the sun surface area is A=4 pie r ^2
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a star with a radius of 12 that of the sun but a surface temperature of 0.5 times that of the sun be more or less luminous than the sun surface area is A=4 pie r ^2
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