Astronomers Discover the Most Pristine Star Ever Found in the Universe

Key Points:

• Astronomers have discovered SDSS J0715-7334, the most pristine star ever found, containing less than 0.005% of the metal content of the Sun, offering a unique glimpse into the formation of the earliest stars and galaxies.
• This star, formed shortly after the Big Bang, is a relic composed almost entirely of hydrogen and helium, making it twice as metal-poor as the previous record holder and providing insights into the universe's primordial conditions.
• The discovery was made using data from the Sloan Digital Sky Survey-V (SDSS-V) and high-resolution observations from the Magellan telescopes at Carnegie Science’s Las Campanas Observatory in Chile.
• SDSS J0715-7334 helps scientists test theories of early star formation and cosmic evolution, as metal-poor stars reveal how the first stars produced heavier elements essential for the development of galaxies, planets, and life.
• The collaborative effort led by researchers at the University of Chicago and Carnegie Observatories highlights the importance of large-scale surveys and advanced telescopes in identifying rare cosmic objects that illuminate the universe's origins.