If the CMB is in all of space, how does the Earth not get cooked in it?
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The CMBR is extremely low magnitude noise in relation to all of the other cosmic energy sources, like the sun.
People have all had digital TV for like 20 years now, so using a TV on a channel you don’t get wouldn’t be a very good analogy, but it’s essentially like having a TV on white noise at your lowest volume setting. You can still have a conversation easily in the same room without even noticing it. While if you cranked the volume to max the noise would drown out anything that was said
If you still listen to FM radio in your car or wherever, then it’s like when you start to lose signal and start hearing that slight crackle as the station gets out of tune. It’s slight enough that you can still listen to the music without being annoyed for a good while until you get further out of range.
That’s because the magnitude of the noise is so slight.
Same deal with CMBR. It’s barely perceptible.
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