What would happen if the core of the sun didn't exist?

Answer 1

If the core of the sun didn't exist we would be in some sort of weird parallel universe where the laws of physics were radically different.

If you somehow managed to magically remove the core of the sun from existence, everything outside the core would collapse into the center of your (now hollow) sphere and form a new core and your sphere would be smaller. Depending on how much mass you removed, Earth's orbit might be screwed up enough to send us either flying off into space (so that we freeze to death, very bad) or hurtling into the sun (planet would be incinerated, also bad). You could also cause a massive decrease in the amount of heat the sun would be giving off.

Either way, should you happen to gain the above mentioned magical powers, unless you are also immortal and don't mind having no one to talk to for eternity I would highly recommend against using them. =)

Answer 2

If the core of the Sun didn't exist, the nuclear fusion process that generates its energy and heat would stop. This would cause the Sun to rapidly cool and shrink, eventually leading to its collapse. The lack of fusion would disrupt the balance between gravity and the internal pressure that currently sustains the Sun, resulting in a dramatic change in its structure and behavior.