Cosmology

Two conflicting methods to measure the expansion rate of the universe give different results, but researchers could resolve the disparity by watching merging neutron stars explode.

A new set of simulations suggests that the unusual brightness of early galaxies discovered by the James Webb telescope could be because of a strange, rapid-burst mode of star formation.

NASA's James Webb Space Telescope has spotted a distant supernova that appears three times in the same photo. The new observations could help solve one of the universe's biggest inconsistencies.

In the extreme hearts of neutron stars, fundamental particles are twisted into strange 'pasta' shapes that could reveal untold secrets about how dead stars evolve.

Mikhail Ivanov, Oliver Philcox, and Marko Simonović won the New Horizons Award for their work on large scale structures — the strands and filaments of our universe which contain buried clues to its most fundamental properties.

Also known as "failed stars," brown dwarfs are celestial bodies that sit on the boundary between gas giant planets and tiny stars.

A century-old mystery of how galaxies change shapes has been solved by considering 'survival of the fittest' collisions between cosmic titans.

Born less than 400 million years after the Big Bang, Maisie's galaxy is officially one of the four oldest galaxies ever discovered, a new JWST study reveals.

The ancient star Earendel is more than twice as hot as the sun and around a million times brighter, new James Webb Space Telescope observations suggest.

Meet the 'bubbletrons' — theoretical particle accelerators that may have helped build the universe as we know it.