Question

astronomer fail hear the sound of each other on the surface of the Moon​

Answer 1

Sound requires a medium to travel and there is no atmosphere on moon i.e no medium to travel therefore it's failed to hear any sound on moon

Answer 2

Answer:

there is no medium for sound

Explanation:

Astronauts float around in space because there is no gravity in space. Everyone knows that the farther you get from Earth, the less the gravitational force is. Astronauts are so far from the Earth that gravity is so small. There is no atmosphere in space, therefore propagation of sound is not possible there. Sound needs a material medium for their propagation. In the space, there is no material medium so astronauts cannot listen to each other.

Hence, an astronaut can't hear his companion at the surface of the moon because there is no medium for sound propagation.