Question

We know that there is no oxygen in the space....then how is the sun burning without oxygen??

Answer 1

Good question
But for firing an object we can also use nitrogen or petrol.
The LPG gas is burnt without oxygen

Answer 2

Physics ??? well it is little bit different in space .. sun burn cause of nuclear fusion .. It uses all the gases present in it . and sun burn hydrogen to helium without the need of oxygen.

The Sun does not "burn", like we think of logs in a fire or paper burning. The Sun glows because it is a very big ball of gas, and a process called nuclear fusion is taking place in its core. Nuclear fusion occurs when one proton smashes into another proton so hard that they stick together...and release some energy as well. This energy then heats up the other materials (other protons and electrons and such) nearby. This heating eventually grows out from the center (or core) of the star to the outside, finally leaving the surface and radiating out into space to be the heat and light we know stars emit.

People, including scientists, sometimes say that the Sun "burns hydrogen" to make it glow. But that is just a figure of speech. Hydrogen really doesn't burn, it fuses, into helium. So no oxygen is required!

here's the NASA'S ANSWER ..

HOPE THAT HELPS..⭐⭐⭐⭐!!