All articles tagged with #metal poor star
Astronomers have discovered SDSS J0715-7334, the most pristine star ever found, composed almost entirely of hydrogen and helium with extremely low levels of heavier elements, challenging previous assumptions about the survival of early stars from the universe's infancy.
Astronomers have discovered the 'most pristine' star ever seen near the edge of the Milky Way, which is extremely metal-poor and may be a direct descendant of the universe's first stars, providing insights into early stellar formation and evolution.
Astronomers have discovered an extremely metal-poor star, SPLUS J1424−2542, using the Gemini High-resolution Optical SpecTrograph (GHOST). Located 25,500 light years away, the star has a mass of 0.84 solar masses and is estimated to be 10 billion years old. GHOST observations confirmed the star's metallicity at approximately -3.39, indicating its extremely metal-poor nature. The star's chemical study suggests it was formed from a gas cloud polluted by at least two progenitor populations, including a metal-free star supernova explosion and the aftermath of a binary neutron star merger. The star belongs to the in-situ Galactic halo population.