How could the sun be burning in space if there is no air?

The sun and other stars don't burn oxygen, they burn other gases. that's what a star is, a big ball of gas. It burns these gases, which is also what is used to classified the stars into Main Sequence stars, Giants, Dwarfs, etc. The sun and other stars don't burn oxygen, they burn other gases. that's what a star is, a big ball of gas. It burns these gases, which is also what is used to classified the stars into Main Sequence stars, Giants, Dwarfs, etc. from the answer on the top.. the sun does not burn oxygen... is eats up the oxygen and make carbon dioxide.