JWST Finds Early Galaxies Already Rich in Heavy Elements
· Science
JWST observations show galaxies were spreading carbon, oxygen and other heavy elements through space just 500 million years after the Big Bang. The finding suggests the young universe became chemically enriched far earlier than expected, possibly erasing traces of the first stars.
Why it matters：If the early universe was chemically mature sooner than models predict, it reshapes theories of first-star formation and the timeline of cosmic evolution.
Key points
- Heavy elements detected only 500 million years after the Big Bang
- Enrichment may have erased signatures of the very first stars
- Results come from JWST observations of early galaxies
Sources (original reporting)
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