Sound needs a medium like air or water to travel. Space is almost a complete vacuum, so sound cannot travel normally.
Even a huge explosion in space would not produce the loud boom we hear on Earth.
Our atmosphere allows sound waves to travel, which is why we can hear voices, engines and explosions.
Yes! Astronauts communicate using radios inside their helmets and spacecraft.
The universe is filled with activity, but without a medium, sound cannot travel through empty space.