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Comet 81P/Wild 2 Under a Microscope

2006; American Association for the Advancement of Science; Volume: 314; Issue: 5806 Linguagem: Inglês

10.1126/science.1135840

1095-9203

D. E. Brownlee, P. Tsou, J. Aléon, C. M. O'd. Alexander, Tohru Araki, S. Bajt, G. A. Baratta, R. Bastien, P. A. Bland, P. Bleuet, J. Borg, J. P. Bradley, A. J. Brearley, Frank E. Brenker, S. Brennan, J. C. Bridges, Nigel D. Browning, J. R. Brucato, E. S. Bullock, M. J. Burchell, H. Busemann, A. L. Butterworth, Marc Chaussidon, A. Cheuvront, Miaofang Chi, M. J. Cintala, B. C. Clark, S. J. Clemett, George D. Cody, L. Colangelí, George Cooper, Patrick Cordier, Charles P. Daghlian, Z. R. Dai, Louis Le Sergeant d’Hendecourt, Z. Djouadi, G. Domínguez, T. C. Duxbury, Jason P. Dworkin, D. S. Ebel, T. Economou, Sirine C. Fakra, Sam A. J. Fairey, Stewart Fallon, G. Ferrini, T. Ferroir, Holger Fleckenstein, C. Floss, George Flynn, I. A. Franchi, M. Fries, Z. Gainsforth, J.‐P. Gallien, Matt Genge, Mary K. Gilles, P. Gillet, J. D. Gilmour, D. P. Glavin, M. Gounelle, M. M. Grady, G. A. Graham, Patrick G. Grant, Simon Green, F. Grossemy, Lawrence Grossman, J. N. Grossman, Yunbin Guan, Kenji Hagiya, R. P. Harvey, P. R. Heck, G. F. Herzog, P. Höppe, Friedrich Hörz, J. Huth, I. D. Hutcheon, Konstantin Ignatyev, H. A. Ishii, Motoo Ito, Damien Jacob, Chris Jacobsen, S. B. Jacobsen, Steven M. Jones, D. J. Joswiak, A. J. G. Jurewicz, A. T. Kearsley, L. P. Keller, H. Khodja, A. L. D. Kilcoyne, J. Kissel, Alexander N. Krot, F. Langenhorst, Antonio Lanzirotti, L. Le, L. A. Leshin, J. Leitner, Laurence Lemelle, Hugues Leroux, Ming‐Chang Liu, K. Luening, I. C. Lyon, G. MacPherson, Matthew A. Marcus, K. K. Marhas, Bernard Marty, G. Matrajt, K. D. McKeegan, Anders Meibom, V. Mennella, Keiko Messenger, S. Messenger, T. Mikouchi, S. Mostefaoui, Tomoki Nakamura, Tsukasa Nakano, M. Newville, L. R. Nittler, Ichiro Ohnishi, K. Ohsumi, Kyoko Okudaira, D. A. Papanastassiou, R. L. Palma, M. E. Palumbo, Robert O. Pepin, David Perkins, M. Perronnet, P. Pianetta, William Rao, Frans J. M. Rietmeijer, F. Robert, Detlef H. Rost, A. Rotundi, Robert Ryan, Scott A. Sandford, C. S. Schwandt, T. H. See, D. J. Schlutter, J Sheffield-Parker, Alexandre Simionovici, S. B. Simon, I. Sitnitsky, C. J. Snead, Maegan K. Spencer, F. J. Stadermann, A. Steele, T. Stephan, R. M. Stroud, Jean Susini, S. R. Sutton, Yoshio Suzuki, Mitra L. Taheri, Susan Taylor, Nick E. Teslich, K. Tomeoka, Naotaka Tomioka, A. Toppani, J. M. Trigo‐Rodríguez, David Troadec, A. Tsuchiyama, A. J. Tuzzolino, Tolek Tyliszczak, Kentaro Uesugi, M. A. Velbel, Joe Vellenga, Edward P. Vicenzi, László Vincze, Jack L. Warren, I. Weber, M. Weisberg, A. J. Westphal, S. Wirick, D. H. Wooden, B. Wopenka, P. J. Wozniakiewicz, I. P. Wright, Hikaru Yabuta, Hajime Yano, Edward Young, Richard N. Zare, T. J. Zega, K. Ziegler, Laurent Zimmerman, E. Zinner, M. E. Zolensky,

Astrophysics and Star Formation Studies

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.