Constraints on the Formation Age of Cometary Material from the NASA Stardust Mission

  title={Constraints on the Formation Age of Cometary Material from the NASA Stardust Mission},
  author={Jennifer E. P. Matzel and Hope A. Ishii and David J. Joswiak and Ian Douglass Hutcheon and James P. Bradley and D. E. Brownlee and Patrick Weber and Nick E. Teslich and Graciela Matrajt and Kevin D. McKeegan and Glenn J. MacPherson},
  pages={483 - 486}
Sun Stuff Comets are thought to be remnants of the Sun's protoplanetary disk; hence, they hold important clues to the processes that originated the solar system. Matzel et al. (p. 483, published online 25 February) present Al-Mg isotope data on a refractory particle recovered from comet Wild 2 by the NASA Stardust mission. The lack of evidence for the extinct radiogenic isotope 26Al implies that this particle crystallized 1.7 million years after the formation of the oldest solar system solids… 


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