Q: If you could hear through space as though it were filled with air, what would you hear?
Physicist: You’d be able to hear the Sun, and nothing else. Maybe at night you’d be able to hear your own thoughts. Similarly, the Sun, if we could hear it, would be exactly as loud as any other large-marble-sized nuclear explosion held at arm’s length. Notably, if sound gets too loud it stops acting like a wave and tends to break apart. It stops acting like sound and starts to act more like a frothy foam of shock fronts.