as the sun evolved it contracted, its internal energy changing fro x to y. whats the total energy radiated, assuming luminosity is comparable with present?(adsbygoogle = window.adsbygoogle || []).push({});

I understand that the rate of change of the internal energy = rate at which energy is radiated away by the star.. but i have been given exact numbers and i dont know what calculations to preform.

any help would be really good. thanks.

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# Suns contraction

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