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The geology of Pluto and Charon through the eyes of New Horizons.
Moore, Jeffrey M; McKinnon, William B; Spencer, John R; Howard, Alan D; Schenk, Paul M; Beyer, Ross A; Nimmo, Francis; Singer, Kelsi N; Umurhan, Orkan M; White, Oliver L; Stern, S Alan; Ennico, Kimberly; Olkin, Cathy B; Weaver, Harold A; Young, Leslie A; Binzel, Richard P; Buie, Marc W; Buratti, Bonnie J; Cheng, Andrew F; Cruikshank, Dale P; Grundy, Will M; Linscott, Ivan R; Reitsema, Harold J; Reuter, Dennis C; Showalter, Mark R; Bray, Veronica J; Chavez, Carrie L; Howett, Carly J A; Lauer, Tod R; Lisse, Carey M; Parker, Alex Harrison; Porter, S B; Robbins, Stuart J; Runyon, Kirby; Stryk, Ted; Throop, Henry B; Tsang, Constantine C C; Verbiscer, Anne J; Zangari, Amanda M; Chaikin, Andrew L; Wilhelms, Don E.
Afiliação
  • Moore JM; National Aeronautics and Space Administration (NASA) Ames Research Center, Space Science Division, Moffett Field, CA 94035, USA. jeff.moore@nasa.gov.
  • McKinnon WB; Department of Earth and Planetary Sciences, Washington University in St. Louis, St. Louis, MO 63130, USA.
  • Spencer JR; Southwest Research Institute, Boulder, CO 80302, USA.
  • Howard AD; Department of Environmental Sciences, University of Virginia, Charlottesville, VA 22904, USA.
  • Schenk PM; Lunar and Planetary Institute, Houston, TX 77058, USA.
  • Beyer RA; The SETI Institute, Mountain View, CA 94043, USA. National Aeronautics and Space Administration (NASA) Ames Research Center, Space Science Division, Moffett Field, CA 94035, USA.
  • Nimmo F; University of California, Santa Cruz, CA 95064, USA.
  • Singer KN; Southwest Research Institute, Boulder, CO 80302, USA.
  • Umurhan OM; National Aeronautics and Space Administration (NASA) Ames Research Center, Space Science Division, Moffett Field, CA 94035, USA.
  • White OL; National Aeronautics and Space Administration (NASA) Ames Research Center, Space Science Division, Moffett Field, CA 94035, USA.
  • Stern SA; Southwest Research Institute, Boulder, CO 80302, USA.
  • Ennico K; National Aeronautics and Space Administration (NASA) Ames Research Center, Space Science Division, Moffett Field, CA 94035, USA.
  • Olkin CB; Southwest Research Institute, Boulder, CO 80302, USA.
  • Weaver HA; Johns Hopkins University Applied Physics Laboratory, Laurel, MD 20723, USA.
  • Young LA; Southwest Research Institute, Boulder, CO 80302, USA.
  • Binzel RP; Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
  • Buie MW; Southwest Research Institute, Boulder, CO 80302, USA.
  • Buratti BJ; NASA Jet Propulsion Laboratory, Pasadena, CA 91019, USA.
  • Cheng AF; Johns Hopkins University Applied Physics Laboratory, Laurel, MD 20723, USA.
  • Cruikshank DP; National Aeronautics and Space Administration (NASA) Ames Research Center, Space Science Division, Moffett Field, CA 94035, USA.
  • Grundy WM; Lowell Observatory, Flagstaff, AZ 86001, USA.
  • Linscott IR; Stanford University, Stanford, CA 94305, USA.
  • Reitsema HJ; Southwest Research Institute, Boulder, CO 80302, USA.
  • Reuter DC; NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA.
  • Showalter MR; The SETI Institute, Mountain View, CA 94043, USA.
  • Bray VJ; University of Arizona, Tucson, AZ 85721, USA.
  • Chavez CL; The SETI Institute, Mountain View, CA 94043, USA. National Aeronautics and Space Administration (NASA) Ames Research Center, Space Science Division, Moffett Field, CA 94035, USA.
  • Howett CJ; Southwest Research Institute, Boulder, CO 80302, USA.
  • Lauer TR; National Optical Astronomy Observatory, Tucson, AZ 85719, USA.
  • Lisse CM; Johns Hopkins University Applied Physics Laboratory, Laurel, MD 20723, USA.
  • Parker AH; Southwest Research Institute, Boulder, CO 80302, USA.
  • Porter SB; Southwest Research Institute, Boulder, CO 80302, USA.
  • Robbins SJ; Southwest Research Institute, Boulder, CO 80302, USA.
  • Runyon K; Johns Hopkins University Applied Physics Laboratory, Laurel, MD 20723, USA.
  • Stryk T; Roane State Community College, Oak Ridge, TN 37830, USA.
  • Throop HB; Planetary Science Institute, Tucson, AZ 85719, USA.
  • Tsang CC; Southwest Research Institute, Boulder, CO 80302, USA.
  • Verbiscer AJ; Department of Astronomy, University of Virginia, Charlottesville, VA 22904, USA.
  • Zangari AM; Southwest Research Institute, Boulder, CO 80302, USA.
  • Chaikin AL; Independent Science Writer, Arlington, VT 05250, USA.
  • Wilhelms DE; U.S. Geological Survey, Retired, Menlo Park, CA 94025, USA.
Science ; 351(6279): 1284-93, 2016 Mar 18.
Article em En | MEDLINE | ID: mdl-26989245
ABSTRACT
NASA's New Horizons spacecraft has revealed the complex geology of Pluto and Charon. Pluto's encounter hemisphere shows ongoing surface geological activity centered on a vast basin containing a thick layer of volatile ices that appears to be involved in convection and advection, with a crater retention age no greater than ~10 million years. Surrounding terrains show active glacial flow, apparent transport and rotation of large buoyant water-ice crustal blocks, and pitting, the latter likely caused by sublimation erosion and/or collapse. More enigmatic features include tall mounds with central depressions that are conceivably cryovolcanic and ridges with complex bladed textures. Pluto also has ancient cratered terrains up to ~4 billion years old that are extensionally faulted and extensively mantled and perhaps eroded by glacial or other processes. Charon does not appear to be currently active, but experienced major extensional tectonism and resurfacing (probably cryovolcanic) nearly 4 billion years ago. Impact crater populations on Pluto and Charon are not consistent with the steepest impactor size-frequency distributions proposed for the Kuiper belt.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Science Ano de publicação: 2016 Tipo de documento: Article País de afiliação: Estados Unidos
Texto completo
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Science Ano de publicação: 2016 Tipo de documento: Article País de afiliação: Estados Unidos