Question

Why do explosions on other planets not heard on the earth?

Answer 1

1. Explosions on other planets are not heard on earth because there lies vacuum space between earth and other planets and sound does not travel in a vacuum, it required some material medium for its propagation.
2. Because sound requires a material medium for its propagation so it does not travel in the vacuum space between the planets and earth.

Hence, this is the reason for not hearing the sound of explosions on other planets.