No, sound does not exist in spacetime as we traditionally understand it. Sound is a mechanical wave that requires a medium, such as air, water, or solids, to propagate. In space, the vacuum between celestial bodies is devoid of matter and, therefore, lacks the necessary medium for sound to travel.
In the absence of a medium, sound waves cannot propagate, and thus, we would not hear any sound in space. However, it's important to note that space is not completely silent. There are other forms of electromagnetic waves, such as radio waves, microwaves, and light waves, which can propagate through the vacuum of space and be detected by appropriate instruments. These electromagnetic waves can be converted into sound waves or data that we can perceive or analyze using specialized equipment, but they are not inherently sound waves themselves.