NASA has unveiled four new images of the cosmos, including Mars, two nebulae, and a distant spiral galaxy. These stunning ...

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

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 ...

Using DESI observations, the team stacked images ... radiation from the cosmic microwave background — leftover radiation from the Big Bang that is prevalent throughout the universe.

Primordial black holes are the earliest black holes thought to exist, and they vanished almost as fast as they came into being. As Stephen Hawking predicted, black holes don’t only draw particles in, ...

Measuring light that has traveled for almost 14 billion years to reach a telescope high in the Chilean Andes, the two new images reveal the universe ... of the cosmic microwave background (CMB).

Our solar system lies in one of the Milky Way’s four spiral arms, nearly two thirds ... space telescope image of the cosmic microwave background (CMB), the relic radiation from the Big Bang.

Cosmic microwave background data support cosmology’s standard model but retain a mystery about the universe’s expansion rate.

Cosmic rays are particles from outer space that travel across the universe. They can be made by the sun ... Some do reach the ground, but they’re generally no worse than any other background radiation ...