Sound waves travel by vibrating particles like air or water. In space, there are almost no particles to carry sound. Explosions, collisions, and cosmic events happen in total silence. Movies often exaggerate How to make phone vibrate when in silent mode? : r iphone Only vibrate mode is missing. Google Pixel Community How to Make iPhone Vibrate or Not Vibrate on Silent Guiding Tech Did You Know? In space, sound cannot travel because there is no air or medium for sound waves to move through. That means explosions in space would actually be completely silent. Vibrations BBC Bitesize