Why does the sound of explosions on the Sun or Moon not reach the Earth?

Why does the sound of explosions on the Sun or Moon not reach the Earth?

Answer: The sound produced by an explosion on the Sun or the Moon cannot be heard on Earth. Sound propagation requires a physical medium. Sound cannot pass through a vacuum. Most spaces are zero for the distance between the Sun or the Moon and the Earth. So when there is an explosion on the sun or the moon, its sound does not reach the earth.