A never-before-seen image of the cosmic microwave background, combining data from the Atacama Cosmology Telescope (ACT) and ...

Scientists analyzed data from 7 million galaxies and stumbled upon a missing piece of the cosmic puzzle. Thanks to the ...

A new approach suggests that a tiny spin of the universe throughout space might reconcile those conflicting numbers. If the ...

A faint cosmic spin – one rotation per 500 billion years – could resolve the stubborn Hubble tension by tweaking standard ...

A slowly spinning universe could resolve a puzzle in physics known as the Hubble tension, a new model suggests.

The halo is more extended that astronomers originally thought, and contains enough hydrogen gas to resolve the problem of the ...

Astronomers tallying up all the normal matter—stars, galaxies and gas—in the universe today have come up embarrassingly short ...

Mysterious dark matter makes up 85 percent of matter in the universe, and of the remaining 15 percent, scientists couldn’t account for half—until now.

In the grand puzzle of the cosmos, one question continues to defy easy answers: how fast is the universe expanding?

A paper published in 2024 theorizes that time may have existed before the Big Bang, but we're still not entirely sure.

About half of the non-dark matter in the universe cannot be accounted for by stars and galaxies alone. Now, scientists say ...

Astronomers may have found the long-missing half of the universe's regular matter—and it appears to have been right under our ...