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Again I understand that work (kinetic) is distance over time. This ain’t what I’m talking about. The Sun no more extracts energy form gravity to burn than you
by dogma1138 8y ago
Again I understand that work (kinetic) is distance over time.
This ain’t what I’m talking about.
The Sun no more extracts energy form gravity to burn than you extract it when you walk but if you turn off gravity then you can’t do either.
The Sun and every other star aren’t static they are in constant balance between their outward pressure and the inner force of gravity, gravity doesn’t just stop when the ignition point is achieved, this is what confines the star and allows the fusion reaction to continue.
Stars have cycles of expansion and contraction and these are understood they are also entirelry governed by the ratio between gravity and their internal pressure fueled by the fusion reaction.
So if the Sun expands it means it is generating more energy than what the current gravitational force confines it in, it would expand until a new balance is reached it cannot expand forever unless you turn off gravity and if it would it would very quickly stop fusing elements because it would expand until it cools beyond the temperature which allows for fusion.