Question

Will resonance occur in Vaccum?

Answer 1

To my current understanding (not that I've left the Earth's comfort), conventional science states that sound requires a substance to move through. We've air on this planet and that does the trick. Water works too which I'm sure you're all well aware, unless you've never heard about dolphins and whales, let alone how they sound under-water (which is rather incredible).

Typically an astronaut's space-suit is pressurized and has an inbuilt communications device (sends/receives using radio waves), due to the fact that you wouldn't want to be exposed to the cold and pressure-less environment in your naked skin.

Next, how about the energy output of colliding matter; collisions between rocks, gasses, liquids and what-not. To my understanding, the law of "conservation of energy" will back me up on this; the energy generated from two colliding rocks will produce a resonance (pertaining to within the rocks themselves), however can not pass through the vacuum and will only be known through light and heat; hence the apparent silence when witnessing dying stars, as opposed to the ear-shattering sounds of sirens and explosions here on Earth...

Peace!