Misconceptions About Space, Time & The Universe (Narration Only)
Science & Futurism with Isaac Arthur
00:00
The Temperature of the Universe
The universe is only about 2.7 Kelvin, way colder than Antarctica or even Pluto. The cosmic microwave background radiation permeates everything and thus is the coldest you can get anything down to currently. But there's something like half a billion of those CMB photons left over from the dawn of the universe passing through any cubic meter of space at any given time. Even beyond that though, if we block off every form of radiation getting some shielded volume and find and pull out every single atom floating around, we still have the reality that we only think of as reality but is actually built on a quantum universe.
Play episode from 09:50
Transcript
