Mercury has no atmosphere.
Mercury is the smallest and the least massive planet, out of the eight in our solar system.
The earth is the largest planet in our atmosphere. Jupiter is the largest planet in out solar system.
Mercury has no atmosphere.
Since sound waves are a compression and rarefaction in the atmosphere, the planet with the least atmosphere (most like a vacuum) would be least likely to have audible sounds on its surface. In our solar system Mercury stands out as the best candidate here since it has almost no atmosphere.
Planet with an atmosphere, Venus. Planet without an atmosphere, Mercury (on the day side).
Mercury is the smallest planet in the Solar System
Mercury is the least massive planet in our solar system.
Jupiter.
Saturn is the least dense planet in our solar system.
The atmoshere is the air around a planet, so it becomes part of the solar system
The solar system doesn't have an atmosphere, it occupies a piece of space which is an empty vacuum. Each planet may have its own atmosphere, a layer of gas at the surface.