“Sound can travel through the vacuum of space”

Many people imagine space as a place filled with dramatic explosions and laser blasts, thanks to countless science fiction movies and TV shows. This cinematic portrayal, while exciting, has largely contributed to the common misconception that sound can travel through the vacuum of space. The truth is, the vastness beyond Earth's atmosphere is, for the most part, profoundly silent.

The scientific reality is that sound requires a medium to propagate. Sound waves are mechanical waves, meaning they transmit energy by causing particles in a substance—like air, water, or solid material—to vibrate and bump into one another. In the near-perfect vacuum of space, there are simply too few molecules per unit volume for these vibrations to effectively travel. Without a sufficient medium, sound waves have nothing to move through, making space an environment where conventional sound cannot exist.

People commonly believe this myth because of the powerful influence of visual media, where sound effects are added to space scenes to heighten drama and immersion. Our everyday experience on Earth also makes it difficult to grasp a truly silent environment, as we are constantly surrounded by air that readily transmits sound. While there are some extremely rare instances where very sparse gas in certain galaxy clusters can carry ultra-low frequency pressure waves, these are far beyond the range of human hearing and not what we typically perceive as sound. So, despite what movies might suggest, a spaceship exploding in space would be a visually stunning, but utterly silent, event.