Use this article and the Sound Moves activity to learn about sound. Then figure out the reason for this space silence. Without vibrations , there would be no sound. To create a sound, the particles in an object must shake. A wave of vibrations moves from the object, through the air, to your ear.
Sound vibrations travel at different speeds through different materials.
When these sound waves travel slowly, much of the sound dies away on the journey. Fast waves can carry more of the original sound to your ears. Space is a vacuum , or nearly so. That means there's no air or other material around.