The Earth, even if all life is wiped out, will not be a ‘quiet’ place (assuming everything else remains the same.) We would hear the sounds of the waves and the breeze and occasionally of the erupting volcanoes and even earthquakes. Are there any audible sounds at all on the moon? Did Neil Armstrong hear the ‘azan’ (Muslim call for prayer) or any other sounds when he touched down on the moon? Thank you in advance.

In order for sound to propogate from one place to another, it requires a medium or a fluid to move through. The air here on Earth allows sound waves to move from one point to another (sound can also move through water, steel, earth, etc… it just requires that particles/atoms/molecules are touching one another). However, the Moon is in space, and space is mostly a vacuum (there are always some atoms floating around, but they are VERY far apart and don’t interact with one another). Thus there is no sound on the Moon. As for what Neil was hearing… the only thing he heard was communications from Houston and his fellow astronauts on Apollo 11. However, good thoughts and prayers are always appreciated and welcomed!!
Brad Bailey
NLSI Staff Scientist

August 25, 2010

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