The new map looked at light from just after the universe was born.
"The distribution agrees very well with theoretical predictions," Hincks said."It's a really satisfying result scientifically because it shows we have a robust understanding of how our universe grows and evolves."To create the map, the scientists used data collected by the ACT, which viewed the heavens from Cerro Toco in the Chilean Atacama Desert for 15 years before it was decommissioned in 2022.
As the universe cooled, particles could start to stick together. Quarks and gluons formed protons and neutrons, and these bonded with electrons to create the first atoms, around 380,000 years after the Big Bang. With fewer free electrons around, photons could travel unimpeded, and the universe became transparent, like a window.
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