The sound of the Earth cannot travel outside of the Earth's atmosphere because sound requires a medium, such as air or water, to propagate. In space, there is a vacuum, which means there is an absence of matter, including air molecules. Sound waves are essentially the vibration and propagation of mechanical energy through a medium, and in the absence of a medium, there are no particles to transmit these vibrations.
On Earth, when a sound is produced, it creates vibrations in the surrounding air molecules. These vibrations then travel as a wave through the air, reaching our ears and allowing us to perceive the sound. However, in the vacuum of space, there are no air molecules or any other medium to carry these vibrations. Therefore, sound waves cannot propagate in space, and the sound of the Earth or any other sound produced on Earth cannot travel outside of our planet.