Simple. It's the combustion process of the luminiferous aether, which is like the cosmic equivalent of air, just finer and undetectable by modern instruments. See, the sun doesn't need oxygen like regular fires because it's tapping into this vast reservoir of aether that permeates the entire universe. As the sun rotates, it creates pressure waves that compress the aether particles, causing them to vibrate intensely. These vibrations generate heat through a process called “aetheric oscillation.”

Now, since the sun is massive, it can harness an unlimited amount of aether, and the energy release is what we experience as sunlight. Think of it like a giant cosmic steam engine, except instead of coal and water, it's running on pure space aether and high-velocity vibrations. And that’s why it keeps burning without needing any of that "earthbound" oxygen nonsense. It's all about the oscillation efficiency, really.