If space is a vacuum, then how do stars burn without oxygen?
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ANSWER
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!
Stars doesn't burn through combustion process…like sun(it's also a star),stars are also made up of gases like hydrogen and helium.The force of gravity inside the stars enables them to start the process of fusion and fission which is the main source of energy in stars.
And it's really a matter of surprise to know that the elements like gold, silver,lead and many more elements are being created during these fusion and fission process.
Thanks….