The universe is getting hotter as it gets older — here’s why

The cosmic web — ribbons of gas and dust tying galaxies together — are the largest structures in the Universe, and a new study shows they are growing hotter over time. Utilizing a phenomenon known as the Sunyaev-Zeldovich effect, astronomers find these ribbons are three times hotter than they were eight billion years ago. “Combining the latest data with a state-of-the-art theoretical model, we were able to reveal how the temperature of the Universe evolved, and how it was linked to the formation of the large-scale structure of the Universe,” Ryu Makiya, a research fellow at the Kavli Institute for the…

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