Neil deGrasse Tyson
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Appearances Over Time
Podcast Appearances
Your walls are room temperature.
So they'll emit a little less infrared because they're not as warm as we are.
You keep dropping the temperature.
What's on the other side of infrared?
the further down the spectrum it shifts, so that when you're only three degrees Kelvin, three degrees above absolute, you're giving off microwaves.
And that's the cosmic microwave background.
Cosmic microwave background.
So, yeah, and it could be dark for you, no problem.
Not many people have been in complete, total darkness in their life.
I was thinking of other ways for that.
Oh, you mean to a cave that's way... You go deep into a cave, make a few turns.
So there's no light getting in at all.