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

A new analysis of astronomical data suggests unknown physics is at work assisting dark energy in acting almost as "antigravity," undoing the work of gravity, which clumps together matter to build vast ...

called the cosmic microwave background, the DESI data shows that dark energy’s impact could be weakening over time. “If this continues then eventually dark energy will not be the dominant forc ...

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

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

Measurements of the faint afterglow of the Big Bang (known as the cosmic microwave background) are also important. They do not directly measure dark energy or how it evolves, but they provide clues ...

The fate of the universe hinges on the balance between matter and dark energy: the fundamental ingredient ... of the universe's infancy—the earliest cosmic time yet accessible to humans.