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The cosmic microwave background offers clues to the early universe from "summary" of The Science of Interstellar by Kip Thorne
The cosmic microwave background is a faint glow of microwave radiation that fills the universe. It was first discovered in the 1960s and is believed to be the afterglow of the Big Bang, the event that created our universe. This background radiation offers valuable clues about the early universe, allowing scientists to understand its properties and evolution. By studying the cosmic microwave background, scientists can learn about the conditions in the early universe. The radiation provides information about the density of matter, the temperature, and the distribution of energy in the universe shortly after the Big Bang. This data allows scientists to test theories about the origin of the universe and the formation of structures such as galaxies and galaxy clusters. One of the most significant discoveries made us...
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