Yes, outer space is completely silent because sound needs a medium, like air, water, or a solid surface, to travel. Sound waves are vibrations that move through particles, but in the vacuum Nicht schon wieder: Pixel Handys haben ein neues Problem Why iPhone May Not Vibrate in Silent Mode and How to Fix It NASA PACE Blog HARP2 Integrates into PACE Observatory Impulse Space MIRA spacecraft Vibration Testing Qualification Experior Laboratories