A comprehensive new study combines decades of research to reveal that we're missing an essential component in our ...

Cepheid variable star RS Puppis pulses with a regular period. (NASA, ESA, Hubble Heritage Team; Howard Bond/STScI & Penn ...

A major international effort has produced an ultra-precise measurement of the Universe’s expansion rate, confirming it’s ...

A new synthesis of astronomical measurements confirms a persistent mismatch that could point to physics beyond current models ...

The universe is stretching apart faster than our current theories of physics can explain, and a new study has just confirmed that the discrepancy is not a fluke.

Scientists confirm the universe is expanding faster than expected, deepening the mystery known as the Hubble tension.

The universe is expanding about 10% faster than it should be, and a fresh set of measurements just made the problem harder to ...

The first method involves direct distance measurements from nearby stars and galaxies. In contrast, the second looks further ...

Artist’s interpretation of the cosmic distance ladder — a succession of overlapping methods used to measure distances across the Universe, where each rung of the ladder provides information that can ...

Gravity, as most people understand it, is the familiar force that pulls a falling apple toward Earth. But for astronomers and ...