Once charted as a 'guest star' in ancient China, dreaded as a harbinger of ill omens in medieval Europe, and preserved in the ...

A bold claim that the universe’s accelerating expansion was an illusion has been put to the test—and failed. Researchers ...

Type Ia supernovae, those stellar explosions used as landmarks to measure the Universe, might not be as reliable as we ...

The team, which included Nobel laureates, debunked claims that cosmic expansion was slowing down.

Nobel laureates Adam Riess and Brian Schmidt co-authored a June 2026 rebuttal correcting two errors in a 2025 South Korean ...

A new method could improve cosmology research by analyzing supernovae together with the galaxies that host them.

An international research coalition has successfully verified that the expansion of the universe is accelerating ...

In recent years, whenever astronomers have gazed into the night sky, they’ve noticed something peculiar: Some of its massive stars—the true titans of the cosmos—appear to be missing. The largest of ...

Artist’s conception of a magnetar surrounded by an accretion disk that is wobbling, or precessing, because of the effects of general relativity. Some models of magnetars suggest that high-speed jets ...

The James Webb Space Telescope is weighing in on a longstanding debate over why we don’t see more of the most massive red supergiant stars go supernova. NASA/ESA/CSA/Northrop Grumman In recent years, ...