Here's why:
* Sound needs a medium to travel: Sound waves are vibrations that travel through matter. They need a medium like air, water, or solids to propagate.
* Outer space is a vacuum: Outer space is nearly a perfect vacuum, meaning there are very few particles for sound waves to travel through.
* No medium, no sound: Without a medium, sound cannot travel.
In summary: Sound travels through air at approximately 343 meters per second (767 miles per hour) at room temperature. However, in the vacuum of outer space, there is no medium for sound to travel through, so it cannot exist.
