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.

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 ...

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.