List of oldest stars

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The age of the oldest known stars approaches the age of the universe, about 13.8 billion years. These are recognized as among the oldest:

Name Age Distance Distance descriptor
Cayrel's Star or BPS CS31082-0001 12.5 billion years ± 4 billion years 14,000 ly (4 kpc) Milky Way Galactic Halo
HE 1327-2326 unstated 4,000 ly Milky Way Galactic Halo
SDSS J102915+172927 or Caffau's Star 13 billion years 4,500 ly (1370 (+150 or −120) pc) Milky Way Galactic Halo
HE0107-5240 13 billion years 36,000 ly Milky Way Galactic Halo
HD 122563 13 billion years 770 ly Milky Way
Sneden's Star 13 billion years 15,300 ly Milky Way Galactic Halo
HE 1523-0901 13.2 billion years 7,500 ly Milky Way Galactic Halo
2MASS J18082002-5104378 B 13.53 billion years[1][2] 1,950 ly Milky Way thin disk
SMSS J031300.36-670839.3 13.6 billion years[3] 6,000 ly Milky Way Galactic Halo or Globular Clusters
BD +17° 3248 13.8 ± 4 billion years[4] 968 ly Milky Way Galactic Halo
HD 140283 or the Methuselah Star 14.46 ± 0.8 (minimum 13.66) billion years[5] 190 ly Milky Way, 19° north of Galactic Centre, closer than the Galactic Bulge
23 stars[which?] identified as "from the cosmic dawn in the bulge of the Milky Way"[6] within 200 million years after the Big Bang 13,000 – 57,000 ly (4.1 – 17.6 kpc) Milky Way Galactic Halo and Bulge

Some of these are among the first stars from reionization (the stellar dawn), ending the Dark Ages (cosmology) about 370,000 years after Big Bang[7]


  1. ^ Schlaufman, Kevin C.; Thompson, Ian B.; Casey, Andrew R. (5 November 2018). "An Ultra Metal-poor Star Near the Hydrogen-burning Limit". The Astrophysical Journal. 867 (2): 98. arXiv:1811.00549. doi:10.3847/1538-4357/aadd97.
  2. ^ News Staff (6 November 2018). "One of Milky Way's Oldest Stars Discovered". Retrieved 11 November 2018.
  3. ^ Miho N. Ishigaki; Nozomu Tominaga; Chiaki Kobayashi; Ken'ichi Nomoto (2014). "FAINT POPULATION III SUPERNOVAE AS THE ORIGIN OF THE MOST IRON-POOR STARS". The Astrophysical Journal Letters. 792 (2): L32. arXiv:1404.4817. Bibcode:2014ApJ...792L..32I. doi:10.1088/2041-8205/792/2/L32.
  4. ^ Cowan, John J.; et al. (June 2002), "The Chemical Composition and Age of the Metal-poor Halo Star BD +17°3248", The Astrophysical Journal, 572 (2): 861–879, arXiv:astro-ph/0202429, Bibcode:2002ApJ...572..861C, doi:10.1086/340347
  5. ^ H. E. Bond; E. P. Nelan; D. A. VandenBerg; G. H. Schaefer; D. Harmer (2013). "HD 140283: A Star in the Solar Neighborhood that Formed Shortly After the Big Bang". The Astrophysical Journal Letters. 765 (1): L12. arXiv:1302.3180. Bibcode:2013ApJ...765L..12B. doi:10.1088/2041-8205/765/1/L12.
  6. ^ L. M. Howes; A. R. Casey; M. Asplund; S. C. Keller; D. Yong; D. M. Nataf; R. Poleski; K. Lind; C. Kobayashi; C. I. Owen; M. Ness; M. S. Bessell; G. S. Da Costa; B. P. Schmidt; P. Tisserand; A. Udalski; M. K. Szymański; I. Soszyński; G. Pietrzyński; K. Ulaczyk; Ł. Wyrzykowski; P. Pietrukowicz; J. Skowron; S. Kozłowski; P. Mróz (26 November 2015). "Extremely metal-poor stars from the cosmic dawn in the bulge of the Milky Way". Nature. 527 (7579): 484–487. arXiv:1511.03930. Bibcode:2015Natur.527..484H. doi:10.1038/nature15747. PMID 26560034.
  7. ^ Rennan Barkana (1 March 2018). "Possible interaction between baryons and dark-matter particles revealed by the first stars". Nature. 555 (7694): 71–74. arXiv:1803.06698. Bibcode:2018Natur.555...71B. doi:10.1038/nature25791.