Question

We all know that oxygen is essential for burning. In spce, there is vacuum. Then how does sun burn????

Answer 1

the Sun can "burn" hydrogen to helium without the need for oxygen. It should be noted that in the presence of carbon, nitrogen and oxygen, stars heavier than the Sun may burn hydrogen to helium by using the C, N and O as catalysts. Even in these stars, however, an absence of oxygen does not prevent nuclear burning.

Answer 2

i think because sun dose not have oxygen it is hydrogen which is present in high ammount and helps it to burn ☺