A recent study has revealed that the universe is expanding at a slower rate than we thought. Researchers from the University of California, Riverside have used quasars to measure the expansion of the universe over the past 7 billion years. Quasars are incredibly bright objects in the distant universe that are powered by supermassive black holes.

By measuring the light emitted from these quasars, the scientists were able to determine the rate of expansion. The results show that the universe has been expanding at a slower rate than what is predicted by the Big Bang theory. This finding could have implications for understanding the evolution of our universe and the nature of dark energy.

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source: Phys.org