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 ...

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

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

A new analysis of the sky has finally confirmed where the missing half of the Universe's visible matter has been hiding.

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.

For decades, scientists have known that ordinary matter — everything made of atoms — accounts for just 15% of the universe’s ...

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 ...