This two-part illustration shows supernova GRB 250314A during its explosion and again three months later, when Webb captured it. Webb confirmed the supernova occurred when the Universe was about 730 million years old. The star clusters at the top left mark its host galaxy. (Image: NASA, ESA, CSA, STScI, Leah Hustak (STScI))
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Moneycontrol12-12-2025, 15:04

Rare Supernova 730M Years Post-Big Bang Seen by JWST

  • JWST spotted a rare supernova from 730 million years after the Big Bang, linked to gamma-ray burst GRB 250314A.
  • The supernova, seen in a galaxy from the Era of Reionisation, was detected months after the burst, appearing brightest due to light expansion.
  • This discovery, detailed in two papers by Levan and Cordier, helps astronomers study early star formation and distant galaxies.
  • Despite its ancient origin, the supernova appears similar to modern ones, challenging previous assumptions about early stars.
  • Researchers plan further JWST observations and advocate for new missions to quickly detect and study early universe events.

Why It Matters: This rare supernova reveals how stars and galaxies evolved in the early universe.

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