If the CMB is in all of space, how does the Earth not get cooked in it?
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The CMB is extremely diffuse. Don’t let the “microwave” part of the cosmic microwave background confuse you; that’s just indicating the range of the wavelengths. The strength of the energy coming in as microwaves is super weak. Earth is far more likely to get cooked in the energy we receive from the sun due to greenhouse gases retaining that energy than we do from the cosmic microwave background radiation. The difference between the two is so overwhelmingly massive it’s probably misleading to even compare them.
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