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Comet 81P/Wild 2 under a microscope |
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| Authors: | Brownlee Don Tsou Peter Aléon Jérôme Alexander Conel M O'd Araki Tohru Bajt Sasa Baratta Giuseppe A Bastien Ron Bland Phil Bleuet Pierre Borg Janet Bradley John P Brearley Adrian Brenker F Brennan Sean Bridges John C Browning Nigel D Brucato John R Bullock E Burchell Mark J Busemann Henner Butterworth Anna Chaussidon Marc Cheuvront Allan Chi Miaofang Cintala Mark J Clark B C Clemett Simon J Cody George Colangeli Luigi Cooper George Cordier Patrick Daghlian C Dai Zurong D'Hendecourt Louis Djouadi Zahia Dominguez Gerardo Duxbury Tom Dworkin Jason P Ebel Denton S Economou Thanasis E Fakra Sirine |
| Affiliation: | Department of Astronomy, University of Washington, Seattle, WA 98195, USA. brownlee@astro.washington.edu |
| Abstract: | The Stardust spacecraft collected thousands of particles from comet 81P/Wild 2 and returned them to Earth for laboratory study. The preliminary examination of these samples shows that the nonvolatile portion of the comet is an unequilibrated assortment of materials that have both presolar and solar system origin. The comet contains an abundance of silicate grains that are much larger than predictions of interstellar grain models, and many of these are high-temperature minerals that appear to have formed in the inner regions of the solar nebula. Their presence in a comet proves that the formation of the solar system included mixing on the grandest scales. |
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