Space and astronomy news
we are exploring the weird and wonderful world of astronomy jargon! Get a good look at today’s topic: the cosmic microwave background!
But when our universe was about 380,000 years old, it cooled to the point that the electrons could settle into their little atomic homes, turning our cosmos into a neutral gas of hydrogen and helium. That left all the radiation hanging around with nothing to do, so off it went. The CMB was discovered accidentally in the 1960’s once we finally developed sensitive microwave detectors. It confirms that the general story of the big bang is accurate; there are no other theories of cosmology that can explain its existence.
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