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Dawn arrives at Ceres: Exploration of a small, volatile-rich world.
Russell, C T; Raymond, C A; Ammannito, E; Buczkowski, D L; De Sanctis, M C; Hiesinger, H; Jaumann, R; Konopliv, A S; McSween, H Y; Nathues, A; Park, R S; Pieters, C M; Prettyman, T H; McCord, T B; McFadden, L A; Mottola, S; Zuber, M T; Joy, S P; Polanskey, C; Rayman, M D; Castillo-Rogez, J C; Chi, P J; Combe, J P; Ermakov, A; Fu, R R; Hoffmann, M; Jia, Y D; King, S D; Lawrence, D J; Li, J-Y; Marchi, S; Preusker, F; Roatsch, T; Ruesch, O; Schenk, P; Villarreal, M N; Yamashita, N.
Afiliação
  • Russell CT; Earth Planetary and Space Sciences, University of California, Los Angeles, 603 Charles Young Drive, Los Angeles, CA 90095-1567, USA. ctrussell@igpp.ucla.edu.
  • Raymond CA; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109-8099, USA.
  • Ammannito E; Earth Planetary and Space Sciences, University of California, Los Angeles, 603 Charles Young Drive, Los Angeles, CA 90095-1567, USA.
  • Buczkowski DL; Johns Hopkins University Applied Physics Laboratory, Laurel, MD 20723-6099, USA.
  • De Sanctis MC; Istituto di Astrofisica e Planetologia Spaziali, Istituto Nazionale di Astrofisica, 00133 Roma, Italy.
  • Hiesinger H; Institut für Planetologie, 48149 Münster, Germany.
  • Jaumann R; Deutsches Zentrum fur Luft-und Raumfahrt, Institute of Planetary Research, 12489 Berlin, Germany.
  • Konopliv AS; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109-8099, USA.
  • McSween HY; Department of Earth and Planetary Sciences, University of Tennessee, Knoxville, TN 37996-1410, USA.
  • Nathues A; Max-Planck-Institut für Sonnensystemforschung, Justus-von-Liebig-Weg 3, 37077 Göttingen, Germany.
  • Park RS; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109-8099, USA.
  • Pieters CM; Brown University, Department of Earth, Environmental, and Planetary Sciences, Providence, RI 02912, USA.
  • Prettyman TH; Planetary Science Institute, Tucson, AZ 85719, USA.
  • McCord TB; The Bear Fight Institute, Winthrop, WA 98862, USA.
  • McFadden LA; NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA.
  • Mottola S; Deutsches Zentrum fur Luft-und Raumfahrt, Institute of Planetary Research, 12489 Berlin, Germany.
  • Zuber MT; Massachussetts Institute of Technology, Cambridge, MA 02139, USA.
  • Joy SP; Earth Planetary and Space Sciences, University of California, Los Angeles, 603 Charles Young Drive, Los Angeles, CA 90095-1567, USA.
  • Polanskey C; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109-8099, USA.
  • Rayman MD; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109-8099, USA.
  • Castillo-Rogez JC; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109-8099, USA.
  • Chi PJ; Earth Planetary and Space Sciences, University of California, Los Angeles, 603 Charles Young Drive, Los Angeles, CA 90095-1567, USA.
  • Combe JP; The Bear Fight Institute, Winthrop, WA 98862, USA.
  • Ermakov A; Massachussetts Institute of Technology, Cambridge, MA 02139, USA.
  • Fu RR; Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY 10968, USA.
  • Hoffmann M; Max-Planck-Institut für Sonnensystemforschung, Justus-von-Liebig-Weg 3, 37077 Göttingen, Germany.
  • Jia YD; Earth Planetary and Space Sciences, University of California, Los Angeles, 603 Charles Young Drive, Los Angeles, CA 90095-1567, USA.
  • King SD; Virginia Tech, Geosciences, Blacksburg, VA 24061, USA.
  • Lawrence DJ; Johns Hopkins University Applied Physics Laboratory, Laurel, MD 20723-6099, USA.
  • Li JY; Planetary Science Institute, Tucson, AZ 85719, USA.
  • Marchi S; Southwest Research Institute, Boulder, CO 80302, USA.
  • Preusker F; Deutsches Zentrum fur Luft-und Raumfahrt, Institute of Planetary Research, 12489 Berlin, Germany.
  • Roatsch T; Deutsches Zentrum fur Luft-und Raumfahrt, Institute of Planetary Research, 12489 Berlin, Germany.
  • Ruesch O; NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA.
  • Schenk P; Lunar and Planetary Institute, Houston, TX 77058, USA.
  • Villarreal MN; Earth Planetary and Space Sciences, University of California, Los Angeles, 603 Charles Young Drive, Los Angeles, CA 90095-1567, USA.
  • Yamashita N; Planetary Science Institute, Tucson, AZ 85719, USA.
Science ; 353(6303): 1008-1010, 2016 09 02.
Article em En | MEDLINE | ID: mdl-27701107
ABSTRACT
On 6 March 2015, Dawn arrived at Ceres to find a dark, desiccated surface punctuated by small, bright areas. Parts of Ceres' surface are heavily cratered, but the largest expected craters are absent. Ceres appears gravitationally relaxed at only the longest wavelengths, implying a mechanically strong lithosphere with a weaker deep interior. Ceres' dry exterior displays hydroxylated silicates, including ammoniated clays of endogenous origin. The possibility of abundant volatiles at depth is supported by geomorphologic features such as flat crater floors with pits, lobate flows of materials, and a singular mountain that appears to be an extrusive cryovolcanic dome. On one occasion, Ceres temporarily interacted with the solar wind, producing a bow shock accelerating electrons to energies of tens of kilovolts.
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Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Science Ano de publicação: 2016 Tipo de documento: Article País de afiliação: Estados Unidos
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Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Science Ano de publicação: 2016 Tipo de documento: Article País de afiliação: Estados Unidos