If all nuclear reactions inside the Sun would have stopped somehow for ever then what all will be the consequences?
My Attempt at the Question:
- Since the reactions were a source of Sun's radiations, therefore any new energy in the form of heat wouldn't be generated inside our Sun. Instead, the already hot Sun's layers would radiate heat to the surrounding, until the Temperature of its surroundings becomes equal to its own. (However, I am unable to comprehend as to how will we compute the temperature of surroundings, since we would have to define 'surroundings' and assign it a temperature).
- Since certain fraction mass that was being converted to energy due to these nuclear reactions, stopping the reactions would reduce the rate of loss and mass and therefore mass will be become constant. Hence the gravitational pull of the Sun on planets remains same instead of getting reduced, as it would if nuclear reactions would've occurred. Hence the mean distance (radius) between the Sun and planets would get reduced. Since the radius of orbits is getting reduced, the velocity of the planets increases, keeping the angular momentum conserved. If the reduction in radii is significant, then some Inner Planets may also be engulfed by the Sun.
- Due to an increase in pressure (pressure buildup) due to the unreacted gases inside the Sun, the Sun would explode like a pressure cooker.
Are any (or all) of the above statements correct? In second point will the fraction of mass being converted to energy be sufficient to cause any significant changes? (Since only about 0.7% of its mass gets converted to energy).
Please do share your own answers to the question given too.