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[deleted] OP t1_ixzk1xi wrote

Reply to comment by AxialGem in In the universe, sound is as rare as liquid water by [deleted]

Sound needs an atmosphere to travel.

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AxialGem t1_ixzlqob wrote

Why specifically an atmosphere?

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[deleted] OP t1_ixzm57t wrote

It’s a vibration that travels through air. I don’t know specifics but it needs an atmosphere.

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AxialGem t1_ixzny6v wrote

Physicists usually use the term sound wave to mean acoustic waves in any medium, there is still sound under water for example

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