A project to map galaxies across the universe may have spied cracks in the foundation of our understanding of the cosmos.

A new analysis of astronomical data suggests unknown physics is at work assisting dark energy in acting almost as ...

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 ...

Not everything we knew about the universe is wrong. But not not everything. The Dark Energy Spectroscopic Instrument (DESI) ...

The great Russian physicist and Nobel laureate Lev Landau once remarked that "cosmologists are often in error, but never in ...

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

One of the Holy Grails in cosmology is a look back at the earliest epochs of cosmic history. Unfortunately, the universe's first few hundred thousand years are shrouded in an impenetrable fog. So far, ...

Fresh DESI data suggests dark energy may evolve over time, contradicting long-standing cosmic expansion theories.

"Really, Euclid is not only a dark universe detective, it's also a time machine. We will look back 10 billion years in cosmic ...

Dark energy, this still mysterious force that accelerates the expansion of the Universe, may have reversed in the distant past. This bold hypothesis, proposed in a new study, could explain ...