Science ❯ Astronomy ❯ Cosmology ❯ Big Bang

Early Universe

Record-Long Gamma-Ray Burst and Earliest-Known Supernova Challenge Models of Cosmic Explosions

The paired discoveries are pushing researchers to rethink gamma‑ray burst progenitor models.

JWST Detects Chemical Fingerprint of Primordial 'Monster Stars' in Early Galaxy

JWST Reveals 'Alaknanda,' a Milky Way–Like Spiral 1.5 Billion Years After the Big Bang

Astronomers Report Most Metal-Poor Star Yet From the Large Magellanic Cloud

Chandra Finds Early Quasar’s Black Hole Growing Beyond the Eddington Limit

JWST Study Points to Earendel Being a Compact Star Cluster

Most Distant Fast Radio Burst Localized to Dwarf Galaxy at z=2.148

Astronomers Reveal Universe’s Earliest Supermassive Black Hole and Record 36-Billion-Solar-Mass Titan

HeH+ Ion’s Reactivity Endured at Cryogenic Temperatures, Reframing Early-Star Cooling

Webb’s 100-Hour Mid-Infrared Survey of Hubble Ultra Deep Field Reveals Ancient Galaxies

Astronomers Capture First Evidence of Quasar Radiation Halting Star Formation in Galaxy Collision