In the vacuum of space, sound waves cannot propagate because they require a medium to travel through. Sound waves are mechanical waves that rely on the vibration of particles in a material medium to transmit energy from one point to another. In the absence of a material medium, such as in the empty regions of space, sound waves cannot propagate or be heard.
In space, where there is no air or other matter to serve as a medium, sound waves are unable to travel. This is why we do not hear sound from distant celestial objects or in the vastness of outer space. However, it's important to note that electromagnetic waves, such as light and radio waves, can still propagate through the vacuum of space because they do not require a physical medium for transmission.