Quote:
Originally Posted by Coen
The Sun, being big (relative to us), burns through about 600,000,000 tonnes of hydrogen converting it into about 596,000,000 tonnes of helium every second via a nuclear fusion process. That short fall of about 4 million tonnes is what has been converted to energy via E=mc^2 or in joules about 3.595x10^(23)
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More perspective:
This huge power averages to ~50W per cubic metre (for the whole Sun), and about 200W per cubic metre for Sun's core.. not very efficient indeed !!
EDIT:
0.273W/m3 average, ~1W/m3 for the core.