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- HE_1523-0901 abstract "HE 1523-0901 is the designation given to a red giant star in the Milky Way galaxy approximately 7500 light years from Earth. It is thought to be a second generation Population II, or metal-poor, star ([Fe/H] = −2.95). The star was found in the sample of bright metal-poor halo stars from the Hamburg/ESO Survey by Anna Frebel and collaborators. The group's research was published in the May 10 2007 issue of The Astrophysical Journal.The star's age, as measured by ESO's Very Large Telescope, is 13.2 billion years. This makes it the second oldest object yet discovered in the galaxy, after HD 140283 and nearly as old as the estimated age of the universe itself (13.8 billion years as measured by Planck). The measurement uncertainty in the age estimate is 0.7 to 2.7 billion years, depending upon the assumptions made to estimate the uncertainty, although the uncertainty in the relative age of this and other stars using the same method is smaller. HE 1523-0901 is the first star whose age was determined using the decay of the radioactive elements uranium and thorium in tandem with measurements of several neutron capture elements. It is believed to have formed directly from the remnants of the first-generation stars that reached the end of their longevity and exploded as supernovae early in the history of known matter.".
- HE_1523-0901 thumbnail He1523a.jpg?width=300.
- HE_1523-0901 wikiPageExternalLink 0510.html.
- HE_1523-0901 wikiPageExternalLink default.aspx?c=a&id=5533.
- HE_1523-0901 wikiPageExternalLink pr-23-07.html.
- HE_1523-0901 wikiPageExternalLink index.html.
- HE_1523-0901 wikiPageExternalLink Astro-Star-Oldest-HE-1523-0901.htm.
- HE_1523-0901 wikiPageID "11196395".
- HE_1523-0901 wikiPageRevisionID "594681607".
- HE_1523-0901 appmagV "11.1".
- HE_1523-0901 constell Libra_(constellation).
- HE_1523-0901 distLy "~7500".
- HE_1523-0901 distPc "~2,300".
- HE_1523-0901 epoch Epoch_(astronomy).
- HE_1523-0901 hasPhotoCollection HE_1523-0901.
- HE_1523-0901 subject Category:Libra_(constellation).
- HE_1523-0901 subject Category:M-type_giants.
- HE_1523-0901 subject Category:Population_II_stars.
- HE_1523-0901 type CelestialBody.
- HE_1523-0901 type Star.
- HE_1523-0901 type PhysicalBody.
- HE_1523-0901 comment "HE 1523-0901 is the designation given to a red giant star in the Milky Way galaxy approximately 7500 light years from Earth. It is thought to be a second generation Population II, or metal-poor, star ([Fe/H] = −2.95). The star was found in the sample of bright metal-poor halo stars from the Hamburg/ESO Survey by Anna Frebel and collaborators.".
- HE_1523-0901 label "HE 1523-0901".
- HE_1523-0901 label "HE 1523-0901".
- HE_1523-0901 label "HE 1523-0901".
- HE_1523-0901 label "HE 1523-0901".
- HE_1523-0901 label "HE 1523-0901".
- HE_1523-0901 label "HE 1523-0901".
- HE_1523-0901 label "HE 1523-0901".
- HE_1523-0901 label "HE 1523-0901".
- HE_1523-0901 label "HE 1523-0901".
- HE_1523-0901 label "HE 1523−0901".
- HE_1523-0901 sameAs HE_1523−0901.
- HE_1523-0901 sameAs HE_1523-0901.
- HE_1523-0901 sameAs HE_1523-0901.
- HE_1523-0901 sameAs HE_1523-0901.
- HE_1523-0901 sameAs HE_1523-0901.
- HE_1523-0901 sameAs HE_1523-0901.
- HE_1523-0901 sameAs HE_1523-0901.
- HE_1523-0901 sameAs HE_1523-0901.
- HE_1523-0901 sameAs m.02r39vq.
- HE_1523-0901 sameAs Q74288.
- HE_1523-0901 sameAs Q74288.
- HE_1523-0901 wasDerivedFrom HE_1523-0901?oldid=594681607.
- HE_1523-0901 depiction He1523a.jpg.
- HE_1523-0901 isPrimaryTopicOf HE_1523-0901.
- HE_1523-0901 name "HE 1523-0901".