“Color of infinite temperature” is a poetic description of the Cosmic Microwave Background (CMB) radiation, the faint glow that permeates the universe. This radiation is the remnant of the Big Bang, the moment of creation in the universe’s history. When the universe was extremely hot and dense, it would have been filled with a brilliant light. As the universe expanded and cooled, this light would have redshifted to longer wavelengths, eventually becoming the CMB radiation we observe today. The CMB radiation is thus a window into the earliest moments of the universe’s existence, allowing scientists to study the conditions and processes that gave rise to the cosmos.
