Until recently, Type Ia supernovae have been treated by cosmologists as the gold standard of cosmic distance determination: quite uniform “standard candles” whose peak brightness was reliable over all ...

New measurements using gravitational lensing suggest the universe’s current expansion rate does not agree with signals from the early cosmos.

Then there was the September discovery of C/2025 R2 (SWAN), a comet so bright that even when it was near the moon on ...

Current physics is speeding toward a breaking point, as astronomers confirm that the Hubble tension in new data.

Beyond its monumental walls, Sacsayhuaman contains a network of springs and channels that hint at a sacred water-focused ...

Scientists are testing a novel way to measure cosmic expansion using time delays in gravitationally lensed quasars. Their ...

Dark matter is special in that it doesn't emit, absorb or interact with light, so science had to find a more creative way to ...

R esearchers have calculated one of the most precise estimates for the expansion rate of the universe today, and it turns out ...

The Atacama Cosmology Telescope in Chile not only confirmed one of the greatest mysteries in the universe—it also ruled out ...

There is an important and unresolved tension in cosmology regarding the rate at which the universe is expanding, and ...

In the leading model of cosmology, most of the universe is invisible: a combined 95% is made of dark matter and dark energy.

"It means cleaning house, narrowing the viable paths forward, and no longer spending energy on what are evidently dead ends." ...