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

Could the universe be rotating at an imperceptible speed? An extremely slow rotation, occurring once every 500 billion years, ...

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

Scientists may have finally found the universe’s missing matter - hidden in invisible hydrogen gas far beyond galaxies.

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

Research done by the Atacama Cosmology Telescope (ACT) project produced the clearest and most accurate images of the universe ...

Mysterious dark matter makes up 85 percent of matter in the universe, and of the remaining 15 percent, scientists couldn’t ...

Scientists suggest that previously undetected hydrogen clouds could account for the untraceable half of the universe's ...

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

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

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