Cosmologists have spent decades trying to pin down exactly how fast the universe is flying apart and whether that rate is ...

For decades, cosmologists have had an awkward number sitting at the center of their equations. The universe is expanding, and ...

After five years of staring at the night sky from a mountaintop in Arizona, the most ambitious galaxy-mapping experiment ever ...

Astronomers have proposed a new way to solve the so-called “Hubble tension,” but the approach ultimately raises more questions than it answers. By way of background, cosmologists are in a bit of a ...

Physicists have long assumed that the universe is uniform at very large scales, but evidence is emerging this is wrong and ...

“You can journey to the ends of the earth in search of success,” 19th-century Baptist preacher Russell Conwell is said to have proclaimed, “but if you’re lucky, you will discover happiness in your own ...

Around 2,500 years ago humankind began to recognize that our planet is round—although a few “flat Earth” supporters still deny this today. The shape of our universe is not clear, however. Previous ...

A team of cosmologists in China has introduced a mathematical framework that investigates two of the deepest mysteries in cosmology at the same time. Publishing their research in The Astrophysical ...

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Invisible "dark matter"—what cosmologists call the mysterious glue that holds everything together—is estimated to make up ...

The Vera C. Rubin Observatory is based in Chile. It sits atop Cerro Pachón mountain. Atop a mountain in Chile, where the skies seem bigger and darker, sits the Vera C. Rubin Observatory, a project of ...