Cosmic fossil star unlocks secrets of the universe's first generations
TL;DR
Astronomers identified PicII-503, an extremely metal-poor second-generation star in the dwarf galaxy Pictor II, with just 1/40,000th the Sun's iron and a striking carbon overabundance. This rare star acts as a fossil record of the universe's earliest element production, offering clues about how the first stars enriched later generations and linking to signatures seen in Milky Way halo stars; the discovery was reported in Nature Astronomy.
- 'At the edge of what we thought possible': Astronomers find extremely rare star from ancient universe Space
- Extremely rare second-generation star discovered inside ancient relic dwarf galaxy Phys.org
- Meet PicII-503, One Of The Most Chemically Primitive Stars That’s Ever Been Discovered IFLScience
- Enrichment by the first stars in a relic dwarf galaxy Nature
- Ancient star opens window to early days of the universe University of Chicago News
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