Why Is Space So Quiet?

Imagine you're in a big, empty room with no air. If you shout, there's no one to hear it, because sound needs something like air or water to move through. Space is kind of like that big empty room, but way bigger! It has almost no air at all, which means sound can't travel the same way it does on Earth. That’s why space feels so quiet.

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Examples

If you blow a whistle on Earth, someone nearby can hear it, but if you blew it in space, no one would hear anything.
You can't shout across space to your friend floating next to the Moon, it's too quiet.
Even when astronauts are walking on the Moon, they wear helmets because there is no air for sound waves to travel through.

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Categories: Space · space· sound· acoustics· universe· astronomy