Comet 81P/Wild 2 Under a Microscope

¹Department of Astronomy, University of Washington, Seattle, WA 98195, USA. ²Jet Propulsion Laboratory, California Institute of Technology, Pasadena CA 91109-8099, USA. ³Centre de Spectrometrie Nucleaire et de Spectrometrie de Masse, Bat 104, 91405 Orsay Campus, France. ⁴Glenn T. Seaborg Institute, Lawrence Livermore National Laboratory, Livermore, CA 94550, USA. ⁵Department of Terrestrial Magnetism, Carnegie Institution, Washington, DC 20015-1305, USA. ⁶Department of Physics, North Carolina State University, Raleigh, NC 27695, USA. ⁷Lawrence Livermore National Laboratory, 7000 East Avenue, L-210, Livermore, CA 94550, USA. ⁸Istituto Nazionale di Astrofisica, Osservatorio Astrofisico di Catania, Via Santa Sofia 78, 95123 Catania, Italy. ⁹Engineering Science Contract Group, NASA Johnson Space Center, Houston, TX 77058, USA. ¹⁰Department of Mineralogy, Natural History Museum, London, SW7 5BD, UK. ¹¹Impact and Astromaterials Research Centre, Department of Earth Sciences and Engineering, Imperial College of Science, Technology, and Medicine, Prince Consort Road, London, SW7 2AZ, UK. ¹²European Synchrotron Research Facility, Grenoble, France. ¹³Institut d'Astrophysique Spatiale, Campus, 91405 Orsay Cedex, France. ¹⁴Institute for Geophysics and Planetary Physics, Lawrence Livermore National Laboratory, Livermore, CA 94550, USA. ¹⁵Department of Earth and Planetary Sciences, University of New Mexico, MSC 03-2040, Albuquerque, NM 87131-0001, USA. ¹⁶Johann Wolfgang Goethe Universitat, Frankfurt, Germany. ¹⁷Stanford Linear Accelerator Center, Menlo Park, CA 94025, USA. ¹⁸Planetary and Space Sciences Research Institute, The Open University, Walton Hall, Milton Keynes MK7 6AA, UK. ¹⁹Department of Chemical Engineering and Materials Science, University of California-Davis, Davis, CA 95616, USA. ²⁰Materials Science and Technology Division, Chemistry and Materials Science Directorate, Lawrence Livermore National Laboratory, Livermore, CA 94550, USA. ²¹INAF, Osservatorio Astronomico di Capodimonte, Via Moiariello 16, 80131 Napoli, Italy. ²²Smithsonian Institution, Washington DC, USA. ²³School of Physical Sciences, University of Kent, Canterbury, Kent CT2 7NH, UK. ²⁴Space Sciences Laboratory, University of California, Berkeley, CA 94720-7450, USA. ²⁵Centre de Recherches Petrographiques et Geochimiques, 15 rue Notre Dame des Pauvres, BP 20, 54501 Vandoeuvre lès Nancy, France. ²⁶Lockheed Martin Space Systems, Littleton, CO 80125, USA. ²⁷Astromaterials Research and Exploration Science, NASA Johnson Space Center, Houston, TX 77058, USA. ²⁸ERC, Inc., NASA Johnson Space Center, Houston, TX 77058 USA. ²⁹Geophysical Laboratory, Carnegie Institution of Washington, Washington, DC 20015 USA. ³⁰Exobiology Branch, NASA Ames Research Center, Moffett Field, CA 94035, USA. ³¹Laboratoire de Structure et Propriétés de l'Etat Solide, Bat C6, Université des Sciences et Technologies de Lille, 59655 Villeneuve d'Ascq, France. ³²Dartmouth College, Hanover, NH 03755, USA. ³³Department of Chemistry and Biochemistry, University of California San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0356, USA. ³⁴Goddard Center for Astrobiology, NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA. ³⁵Department of Earth and Planetary Sciences, American Museum of Natural History, New York, NY 10024, USA. ³⁶Laboratory for Astrophysics and Space Research, Enrico Fermi Institute, University of Chicago, 933 East 56th Street, Chicago, IL 60637, USA. ³⁷Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720-8225, USA. ³⁸Centre for Astrophysics and Planetary Sciences, University of Kent, Canterbury, Kent CT2 7NH, UK. ³⁹Novaetech s.r.l., Napoli, Italy. ⁴⁰Laboratoire de Sciences de la Terre, Ecole Normale Superieure de Lyon, 46, allee d'Italie, 69007, Lyon, France. ⁴¹Physics and Astronomy Department, SUNY at Stony Brook, Stony Brook, NY 11794-3800, USA. ⁴²Laboratory for Space Sciences, CB1105, Washington University, St. Louis, MO 63160-4899, USA. ⁴³Department of Physics, SUNY, Plattsburgh, NY 12901, USA. ⁴⁴Open University, Milton Keynes MK7 6AA, UK. ⁴⁵Laboratoire Pierre Süe, CEA-Saclay 91191 Gif sur Yvette, France. ⁴⁶Impact and Astromaterials Research Centre, Department of Earth Sciences and Engineering, Imperial College of Science Technology and Medicine, London, SW7 2AZ, UK. ⁴⁷Chemical Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720-8225, USA. ⁴⁸School of Earth, Atmospheric and Environmental Sciences, University of Manchester, Manchester, M13 9PL, UK. ⁴⁹Museum National d'Histoire Naturelle, Laboratoire d'Etude de la Matiere Extraterrestre, USM 0205 (LEME), Case Postale 52, 57, rue Cuvier, 75005 Paris, France. ⁵⁰Department of the Geophysical Sciences, University of Chicago, 5734 South Ellis Avenue, Chicago, IL 60637, USA. ⁵¹United States Geological Survey, 954 National Center, Reston, VA 20192, USA. ⁵²Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125, USA. ⁵³Geology Department, Case Western Reserve University, Cleveland, OH 44106, USA. ⁵⁴Max Planck Institute for Chemistry, Particle Chemistry Department, P.O. Box 3060, 55020 Mainz, Germany. ⁵⁵Rutgers University, Piscataway NJ, USA. ⁵⁶Astromaterials Research and Exploration Science, NASA Johnson Space Center, Houston, Texas 77058, USA. ⁵⁷Stanford Synchrotron Radiation Laboratory, Stanford Linear Accelerator Center, Menlo Park, CA 94025, USA. ⁵⁸Robert M. Walker Laboratory for Space Science, Astromaterials Research and Exploration Science Directorate, NASA Johnson Space Center, Houston, TX 77058, USA. ⁵⁹Laboratoire de Structure et Propriétés de l'Etat Solide, Bat C6, Université des Sciences et Technologies de Lille, 59655 Villeneuve d'Ascq, France. ⁶⁰Physics and Astronomy Department, SUNY at Stony Brook, Stony Brook, NY 11794-3800, USA. ⁶¹Department of Earth and Planetary Sciences, Harvard University, 20 Oxford Street, Cambridge, MA 02138, USA. ⁶²Center for Meteorite Studies, Arizona State University, m/c 1404, Tempe AZ 85287, USA. ⁶³Max Planck Institut for Solar System Research, Max-Planck-Strasse 2, 37191Katlenburg-Lindau, Germany. ⁶⁴Hawaii Institute of Geophysics and Planetology, University of Hawaii, Honolulu, HI 96822, USA. ⁶⁵Institute of Geosciences, Friedrich-Schiller-University Jena, Burgweg 11, D-07749 Jena, Germany. ⁶⁶Center for Advanced Radiation Studies, University of Chicago, Chicago, IL 60637, USA. ⁶⁷Jacobs Sverdrup, ESCG, Houston, TX 77058, USA. ⁶⁸Sciences and Exploration Directorate, NASA, Goddard Space Flight Center, Greenbelt, MD 20771, USA. ⁶⁹Institut für Planetologie, Westfälische Wilhelms-Universität, Münster, Germany. ⁷⁰Université Lille, Lille, France. ⁷¹Department of Earth and Space Sciences, University of California Los Angeles, Los Angeles, CA 90095-1567, USA. ⁷²McDonnell Center for the Space Sciences, Department of Physics, Washington University, St. Louis, MO 63130, USA. ⁷³Centre de Recherches Petrographiques et Geochimiques, 15 rue Notre Dame des Pauvres, BP 20, 54501 Vandoeuvre lès Nancy, France. ⁷⁴INAF, Osservatorio Astronomico di Capodimonte, Via Moiariello 16, 80131 Napoli, Italy. ⁷⁵Department of Earth and Planetary Science, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan. ⁷⁶Museum National d'Histoire Naturelle, Laboratoire d'Etude de la Matiere Extraterrestre, 57 rue Cuvier, 75005, Paris, France. ⁷⁷Kyushu University, Fukuoka, Japan. ⁷⁸Advanced Industrial Science and Technology, Geological Survey of Japan, Ibaragi, Japan. ⁷⁹Department of Earth and Planetary Sciences, Faculty of Science, Kobe University, Nada, Kobe 657-8501, Japan. ⁸⁰Institute of Materials Structure Science, Tsukuba-shi, Ibaraki-ken, 305, Japan. ⁸¹Japan Aerospace Exploration Agency, Institute of Space and Astronautical Science, 3-1-1 Yoshinodai, Sagamihara, Kanagawa, 229-8510, Japan. ⁸²Science Division, Jet Propulsion Laboratory, 4800 Oak Grove Drive, Pasadena, CA 91109, USA. ⁸³Department of Physics and Astronomy, Minnesota State University, 141 Trafton Science Center N, Mankato, MN 56001, USA. ⁸⁴School of Physics and Astronomy, University of Minnesota, Minneapolis, MN 55455, USA. ⁸⁵Savannah River Ecology Lab, Aiken, SC 29801, USA. ⁸⁶Dip. Scienze Applicate, Università degli Studi di Parthenope, Napoli, Italy. ⁸⁷Astrophysics Branch, NASA Ames Research Center, Moffett Field, CA 94035, USA. ⁸⁸Engineering Science Contract/Barrios Technology, Astromaterials Research and Exploration Science/Johnson Space Center, Houston, Texas 77258-8447, USA. ⁸⁹U.S. Naval Research Laboratory, Washington, DC 20375, USA. ⁹⁰State University of New York, Plattsburgh, NY 12901, USA. ⁹¹Japan Synchrotron Radiation Institute, Hyougo, Japan. ⁹²Engineer Research and Development Center, Cold Regions Research and Engineering Laboratory, Hanover, NH 03755, USA. ⁹³Institute of Space Sciences Institut d'Estudis Espacials de Catalunya, CSIC, Universitat Autònoma de Barcelona, Campus UAB, 08193 Bellaterra (Barcelona), Spain. ⁹⁴Institut d'Estudis Espacials de Catalunya (IEEC), Ed. Nexus, Gran Capità, 2-4, 08034 Barcelona, Spain. ⁹⁵Department of Earth and Space Science, Osaka University, 1-1 Machikaneyamacho, Toyonaka, 560-0043, Japan. ⁹⁶Department of Chemistry, Stanford University, Stanford, California 94305-5080, USA. ⁹⁷Department of Geological Sciences, Michigan State University, East Lansing, MI 48824-1115, USA. ⁹⁸Ghent Univ, Ghent, Belgium. ⁹⁹Physical Sciences, Kingsborough Community College (CUNY), Brooklyn, NY 11235, USA. ¹⁰⁰Department of Earth and Planetary Sciences, Washington University, St. Louis, MO 63130-4899, USA.