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

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

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 ...

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

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

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

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

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

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