James Webb Telescope uncovers the oldest supernova ever observed

The James Webb Space Telescope has discovered the oldest supernova ever recorded. This explosive event took place when the universe was only 730 million years old—far earlier than any previously observed supernova. The findings were published in two studies in Astronomy & Astrophysics Letters. Astronomers first spotted the supernova after detecting a gamma-ray burst, an intense flash of light triggered by the star’s collapse. Such bursts are rare, and the longest ones often signal the death of a massive star in a supernova explosion.

The telescope observed the aftermath three and a half months later, once the burst’s glow had dimmed. For the first time, it also identified the host galaxy of such a distant cosmic event. This discovery breaks the previous record, held by a supernova from when the universe was 1.8 billion years old. The findings provide new insights into the early universe, where stars formed and died in ways different from today’s cosmic activity.

The detection confirms the James Webb Telescope’s ability to uncover ancient cosmic phenomena. By studying this supernova, researchers can now examine star formation and destruction in the universe’s infancy. The results are documented in two papers, offering a clearer picture of the early cosmos.