* Sound needs a medium: Sound waves are vibrations that travel through matter (like air, water, or solids). These vibrations cause molecules to bump into each other, transmitting the sound.
* Vacuum of space: Space is a near-perfect vacuum, meaning there are very few particles for sound waves to travel through.
So, while there's no "velocity of sound" in space, it's important to note:
* Sound can travel through spacecraft: Inside a spacecraft, there's air, allowing sound to travel.
* Other waves exist: Electromagnetic radiation (like light) can travel through space, but this is not sound.
