Why is nuclear fusion possible only in the cores of stars?

E = mc only works in the cores of stars.
Hydrogen exists only at the cores of stars.
Hydrogen and helium nuclei require a lot of light to bond together.
High temperatures and pressures, which are required for fusion to occur, only occur in the core.

Question

Why is nuclear fusion possible only in the cores of stars?
 		
	E = mc only works in the cores of stars.
	Hydrogen exists only at the cores of stars.
	Hydrogen and helium nuclei require a lot of light to bond together.
	High temperatures and pressures, which are required for fusion to occur, only occur in the core.

anonymous · Answer

Any opinion on the matter will significantly help.

vjt · Answer

This was asked on yahoo answers before...Maybe the answer they got might help you https://answers.yahoo.com/question/index?qid=20100319175353AAcYo8c No it only occurs in the core of the star. Some times nuclear fusion occurs in a inner shell outside of the core. This is when a star leaves it main sequence phase and starts converting hydrogen into oxygen and carbon. But our sun will never go beyond Helium. For nuclear fusion you need very high pressures, ins tars thats gravity trying to collapse the core. And the minimum temperature for nuclear fusion to begin is 10 million K, thats about 18 million °F There isn't enough pressure or high enough temperature anywhere outside of the core for nuclear fusion to take place. Thats why its only possible in the core, and sometimes the inner shell of the star.

anonymous · Answer

D