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Particle's still collide in space. There's nothing keeping them from doing that. Collisions simply increase due to increased pressure. It's not really technical, just true. If anything it's a misunderstanding to imply otherwise or that empty space exists. If you want to distinguish human audible. Then certainly it isn't that. But then neither are infrasound or ultrasound.
Technically and extremely fascinating is that "space itself" not just the baryons inside it, is still a medium. Its literally how LIGO functions. And if that's not mind blowing enough, there actually are massive structures in space caused by pressure waves that we can detect. Those are technical. And another fun fact, if the atmospheric pressure at sea level extended all the way to the sun. We would be able to perceive the sound of the sun. Millions of miles away. Everywhere across the surface of the earth a constant 100 Dba roar. A bit quieter than standing close to a jet engine.
Thank you for the rabbit holes, interesting stuff!
Just coming back to say the rabbit hole lasted about 7 hours lmao
I'm surprised the sun would fall so neatly in our hearing range. Seems like the odds of it instantly shredding our eardrums, or being too faint to perceive were much higher.
Remember that dB is a logarithmic scale. Each 10 is 10x bigger than the 1 before. We talk at around 60dB, so 10,000x quieter. We can hear from around -9dB to 90dB (into hearing damage territory) that's a 10,000,000,000x range. If you allow for hearing damage, a gunshot is around 140dB. So add 5 extra zeros to that.
Human hearing is insane.
Aha and hearing people told us the sun wasn't loud!