New data further challenge the best scientific theory of the history and the structure of the universe. But a separate recent ...

The Hubble constant is one of the most important numbers in cosmology because it tells us how fast the universe is expanding, which can be used to determine the age of the universe and its history. It ...

Dark energy is a mystery so daunting that it stretches and strains our most robust theories. The universe is expanding, ...

Imagine rewinding the clock to the very beginning of the universe. What would you see? Not the glittering galaxies captured ...

After five years of staring unblinking at the sky, the Atacama Cosmology Telescope (ACT) has compiled the most detailed map ...

The finest ever map of the cosmic microwave background - the faint evidence of the universe's early form - has yielded ...

He announced his finding in 1929. The ratio of distance to redshift was 170 kilometers/second per light year of distance, now called Hubble's constant. The numbers were not exactly right ...

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

The clearest and most precise images yet of the universe’s infancy from the Atacama Cosmology Telescope show the first steps ...

Physicists may need to come up with a new theory for how the universe works, after a dark energy experiment has produced ...

Dark energy, the mysterious phenomenon that powers the expansion of the universe, may undergo periodic 'violent transitions' ...

Or, more precisely, astronomers have used multiple methods of estimating the Hubble constant, and the different methods are converging quite tightly on two different values! This clearly can’t ...