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Zhao J, Dong L, Wang Y, Zhang J, Zhu R, Li C, Hong M. Amino-acid modulated hierarchical In/H-Beta zeolites for selective catalytic reduction of NO with CH 4 in the presence of H 2O and SO 2. NANOSCALE 2022; 14:5915-5928. [PMID: 35373805 DOI: 10.1039/d2nr00731b] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Selective catalytic reduction of NO with CH4 (CH4-SCR) has been studied over a series of amino-acid mediated hierarchical beta zeolites with indium exchange. Amino acid mesoporogens greatly affect the NO reduction (DeNOx) efficiency of In/H-Beta catalysts. Mesoporous In/H-Beta-P synthesized using proline exhibits the highest NOx removal efficiency of 40% in excess oxygen and poisonous SO2 and H2O, 10% higher than our previously optimized In/H-Beta catalyst using commercial beta zeolites with a similar Si/Al ratio. Analyses using XRD, N2 adsorption-desorption, EPR, SEM, TEM, EDX, ICP, 27Al and 29Si MAS NMR, XPS, H2-TPR, NH3-TPD, and Py-IR reveal that amino acids promote beta crystallization, modulate zeolite acid sites and surface oxygen species, and generate hierarchical pore architectures without affecting the Si/Al ratio, indium content, and percentage of the active InO+ species. The mosaic-structured In/H-Beta-P exhibits the strongest Brønsted acidity and surface labile oxygen which enhance the oxyindium interaction with the zeolite framework, promoting CH4-SCR activity. The strong acidity, surface active oxygen species, and mesopores lead to excellent stability of the In/H-Beta-P catalyst in the presence of SO2 and H2O, withstanding several catalytic DeNOx cycles under harsh reaction conditions.
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Affiliation(s)
- Jiuhu Zhao
- State Key Laboratory of Urban Water Resource and Environment, Shenzhen Key Laboratory of Organic Pollution Prevention and Control, School of Civil and Environmental Engineering, Harbin Institute of Technology Shenzhen, Shenzhen 518055, P.R. China.
| | - Lei Dong
- State Key Laboratory of Chemical Oncogenomics, Guangdong Provincial Key Laboratory of Nano-Micro Materials Research, School of Chemical Biology & Biotechnology, Peking University Shenzhen Graduate School (PKUSZ), Shenzhen 518055, P.R. China.
| | - Yungang Wang
- Everbright Environmental Technology Research Institute (Shenzhen) Co., Ltd, Shenzhen 518071, P. R. China
| | - Jingwen Zhang
- State Key Laboratory of Urban Water Resource and Environment, Shenzhen Key Laboratory of Organic Pollution Prevention and Control, School of Civil and Environmental Engineering, Harbin Institute of Technology Shenzhen, Shenzhen 518055, P.R. China.
| | - Rongshu Zhu
- State Key Laboratory of Urban Water Resource and Environment, Shenzhen Key Laboratory of Organic Pollution Prevention and Control, School of Civil and Environmental Engineering, Harbin Institute of Technology Shenzhen, Shenzhen 518055, P.R. China.
| | - Chaolin Li
- State Key Laboratory of Urban Water Resource and Environment, Shenzhen Key Laboratory of Organic Pollution Prevention and Control, School of Civil and Environmental Engineering, Harbin Institute of Technology Shenzhen, Shenzhen 518055, P.R. China.
| | - Mei Hong
- State Key Laboratory of Chemical Oncogenomics, Guangdong Provincial Key Laboratory of Nano-Micro Materials Research, School of Chemical Biology & Biotechnology, Peking University Shenzhen Graduate School (PKUSZ), Shenzhen 518055, P.R. China.
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2
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Blocks Size Frequency Distribution in the Enceladus Tiger Stripes Area: Implications on Their Formative Processes. UNIVERSE 2021. [DOI: 10.3390/universe7040082] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
We study the size frequency distribution of the blocks located in the deeply fractured, geologically active Enceladus South Polar Terrain with the aim to suggest their formative mechanisms. Through the Cassini ISS images, we identify ~17,000 blocks with sizes ranging from ~25 m to 366 m, and located at different distances from the Damascus, Baghdad and Cairo Sulci. On all counts and for both Damascus and Baghdad cases, the power-law fitting curve has an index that is similar to the one obtained on the deeply fractured, actively sublimating Hathor cliff on comet 67P/Churyumov-Gerasimenko, where several non-dislodged blocks are observed. This suggests that as for 67P, sublimation and surface stresses favor similar fractures development in the Enceladus icy matrix, hence resulting in comparable block disaggregation. A steeper power-law index for Cairo counts may suggest a higher degree of fragmentation, which could be the result of localized, stronger tectonic disruption of lithospheric ice. Eventually, we show that the smallest blocks identified are located from tens of m to 20–25 km from the Sulci fissures, while the largest blocks are found closer to the tiger stripes. This result supports the ejection hypothesis mechanism as the possible source of blocks.
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Ewing RC, Lapotre MGA, Lewis KW, Day M, Stein N, Rubin DM, Sullivan R, Banham S, Lamb MP, Bridges NT, Gupta S, Fischer WW. Sedimentary processes of the Bagnold Dunes: Implications for the eolian rock record of Mars. JOURNAL OF GEOPHYSICAL RESEARCH. PLANETS 2017; 122:2544-2573. [PMID: 29497590 PMCID: PMC5815379 DOI: 10.1002/2017je005324] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Revised: 06/19/2017] [Accepted: 06/26/2017] [Indexed: 05/31/2023]
Abstract
The Mars Science Laboratory rover Curiosity visited two active wind-blown sand dunes within Gale crater, Mars, which provided the first ground-based opportunity to compare Martian and terrestrial eolian dune sedimentary processes and study a modern analog for the Martian eolian rock record. Orbital and rover images of these dunes reveal terrestrial-like and uniquely Martian processes. The presence of grainfall, grainflow, and impact ripples resembled terrestrial dunes. Impact ripples were present on all dune slopes and had a size and shape similar to their terrestrial counterpart. Grainfall and grainflow occurred on dune and large-ripple lee slopes. Lee slopes were ~29° where grainflows were present and ~33° where grainfall was present. These slopes are interpreted as the dynamic and static angles of repose, respectively. Grain size measured on an undisturbed impact ripple ranges between 50 μm and 350 μm with an intermediate axis mean size of 113 μm (median: 103 μm). Dissimilar to dune eolian processes on Earth, large, meter-scale ripples were present on all dune slopes. Large ripples had nearly symmetric to strongly asymmetric topographic profiles and heights ranging between 12 cm and 28 cm. The composite observations of the modern sedimentary processes highlight that the Martian eolian rock record is likely different from its terrestrial counterpart because of the large ripples, which are expected to engender a unique scale of cross stratification. More broadly, however, in the Bagnold Dune Field as on Earth, dune-field pattern dynamics and basin-scale boundary conditions will dictate the style and distribution of sedimentary processes.
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Affiliation(s)
- R. C. Ewing
- Department of Geology and GeophysicsTexas A&M UniversityCollege StationTexasUSA
| | - M. G. A. Lapotre
- Division of Geological and Planetary SciencesCalifornia Institute of TechnologyPasadenaCaliforniaUSA
| | - K. W. Lewis
- Department of Earth and Planetary SciencesJohns Hopkins UniversityBaltimoreMarylandUSA
| | - M. Day
- Jackson School of Geosciences, Department of Geological SciencesUniversity of Texas at AustinAustinTexasUSA
| | - N. Stein
- Division of Geological and Planetary SciencesCalifornia Institute of TechnologyPasadenaCaliforniaUSA
| | - D. M. Rubin
- Department of Earth and Planetary SciencesUniversity of CaliforniaSanta CruzCaliforniaUSA
| | - R. Sullivan
- Department of AstronomyCornell UniversityIthacaNew YorkUSA
| | - S. Banham
- Department of Earth Science and EngineeringImperial College LondonLondonUK
| | - M. P. Lamb
- Division of Geological and Planetary SciencesCalifornia Institute of TechnologyPasadenaCaliforniaUSA
| | - N. T. Bridges
- The Johns Hopkins University Applied Physics LaboratoryLaurelMarylandUSA
| | - S. Gupta
- Department of Earth Science and EngineeringImperial College LondonLondonUK
| | - W. W. Fischer
- Division of Geological and Planetary SciencesCalifornia Institute of TechnologyPasadenaCaliforniaUSA
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Boehnhardt H, Bibring JP, Apathy I, Auster HU, Ercoli Finzi A, Goesmann F, Klingelhöfer G, Knapmeyer M, Kofman W, Krüger H, Mottola S, Schmidt W, Seidensticker K, Spohn T, Wright I. The Philae lander mission and science overview. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2017; 375:rsta.2016.0248. [PMID: 28554970 PMCID: PMC5454222 DOI: 10.1098/rsta.2016.0248] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 01/12/2017] [Indexed: 05/25/2023]
Abstract
The Philae lander accomplished the first soft landing and the first scientific experiments of a human-made spacecraft on the surface of a comet. Planned, expected and unexpected activities and events happened during the descent, the touch-downs, the hopping across and the stay and operations on the surface. The key results were obtained during 12-14 November 2014, at 3 AU from the Sun, during the 63 h long period of the descent and of the first science sequence on the surface. Thereafter, Philae went into hibernation, waking up again in late April 2015 with subsequent communication periods with Earth (via the orbiter), too short to enable new scientific activities. The science return of the mission comes from eight of the 10 instruments on-board and focuses on morphological, thermal, mechanical and electrical properties of the surface as well as on the surface composition. It allows a first characterization of the local environment of the touch-down and landing sites. Unique conclusions on the organics in the cometary material, the nucleus interior, the comet formation and evolution became available through measurements of the Philae lander in the context of the Rosetta mission.This article is part of the themed issue 'Cometary science after Rosetta'.
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Affiliation(s)
- Hermann Boehnhardt
- Max Planck Institute for Solar System Research, Justus-von-Liebig-Weg 3, 37077 Göttingen, Germany
| | | | - Istvan Apathy
- Atomic Energy Research Institute, PO Box 49, 1525 Budapest, Hungary
| | - Hans Ulrich Auster
- Institute for Geophysics and Extraterrestrial Physics, Technical University Braunschweig, Mendelssohnstr. 3, 38106 Braunschweig, Germany
| | | | - Fred Goesmann
- Max Planck Institute for Solar System Research, Justus-von-Liebig-Weg 3, 37077 Göttingen, Germany
| | - Göstar Klingelhöfer
- Institute for Inorganic and Analytical Chemistry, Johannes Gutenberg University, Staudinger Weg 9, 55099 Mainz, Germany
| | - Martin Knapmeyer
- Institute of Planetary Research, Deutsches Zentrum für Luft- und Raumfahrt, Rutherfordstr. 2, 12489 Berlin, Germany
| | - Wlodek Kofman
- UGA-Grenoble CNRS-INSU, Institut de Planétologie et d'Astrophysique de Grenoble, UMR 5274, 38058 Grenoble, France
| | - Harald Krüger
- Max Planck Institute for Solar System Research, Justus-von-Liebig-Weg 3, 37077 Göttingen, Germany
| | - Stefano Mottola
- Institute of Planetary Research, Deutsches Zentrum für Luft- und Raumfahrt, Rutherfordstr. 2, 12489 Berlin, Germany
| | - Walter Schmidt
- Space Research Division, Finnish Meteorological Institute, 00560 Helsinki, Finland
| | - Klaus Seidensticker
- Institute of Planetary Research, Deutsches Zentrum für Luft- und Raumfahrt, Rutherfordstr. 2, 12489 Berlin, Germany
| | - Tilman Spohn
- Institute of Planetary Research, Deutsches Zentrum für Luft- und Raumfahrt, Rutherfordstr. 2, 12489 Berlin, Germany
| | - Ian Wright
- Planetary and Space Science Research Institute, The Open University, Walton Hall, Milton Keynes MK7 6AA, UK
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Taylor MGGT, Altobelli N, Buratti BJ, Choukroun M. The Rosetta mission orbiter science overview: the comet phase. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2017; 375:rsta.2016.0262. [PMID: 28554981 PMCID: PMC5454230 DOI: 10.1098/rsta.2016.0262] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 03/07/2017] [Indexed: 05/11/2023]
Abstract
The international Rosetta mission was launched in 2004 and consists of the orbiter spacecraft Rosetta and the lander Philae. The aim of the mission is to map the comet 67P/Churyumov-Gerasimenko by remote sensing, and to examine its environment in situ and its evolution in the inner Solar System. Rosetta was the first spacecraft to rendezvous with and orbit a comet, accompanying it as it passes through the inner Solar System, and to deploy a lander, Philae, and perform in situ science on the comet's surface. The primary goals of the mission were to: characterize the comet's nucleus; examine the chemical, mineralogical and isotopic composition of volatiles and refractories; examine the physical properties and interrelation of volatiles and refractories in a cometary nucleus; study the development of cometary activity and the processes in the surface layer of the nucleus and in the coma; detail the origin of comets, the relationship between cometary and interstellar material and the implications for the origin of the Solar System; and characterize asteroids 2867 Steins and 21 Lutetia. This paper presents a summary of mission operations and science, focusing on the Rosetta orbiter component of the mission during its comet phase, from early 2014 up to September 2016.This article is part of the themed issue 'Cometary science after Rosetta'.
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Affiliation(s)
| | - N Altobelli
- ESA/ESAC, 28692 Villanueva de la Cañada, Spain
| | - B J Buratti
- JPL/California Institute of Technology, Pasadena, CA 91109, USA
| | - M Choukroun
- JPL/California Institute of Technology, Pasadena, CA 91109, USA
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Giant ripples on comet 67P/Churyumov-Gerasimenko sculpted by sunset thermal wind. Proc Natl Acad Sci U S A 2017; 114:2509-2514. [PMID: 28223535 DOI: 10.1073/pnas.1612176114] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Explaining the unexpected presence of dune-like patterns at the surface of the comet 67P/Churyumov-Gerasimenko requires conceptual and quantitative advances in the understanding of surface and outgassing processes. We show here that vapor flow emitted by the comet around its perihelion spreads laterally in a surface layer, due to the strong pressure difference between zones illuminated by sunlight and those in shadow. For such thermal winds to be dense enough to transport grains-10 times greater than previous estimates-outgassing must take place through a surface porous granular layer, and that layer must be composed of grains whose roughness lowers cohesion consistently with contact mechanics. The linear stability analysis of the problem, entirely tested against laboratory experiments, quantitatively predicts the emergence of bedforms in the observed wavelength range and their propagation at the scale of a comet revolution. Although generated by a rarefied atmosphere, they are paradoxically analogous to ripples emerging on granular beds submitted to viscous shear flows. This quantitative agreement shows that our understanding of the coupling between hydrodynamics and sediment transport is able to account for bedform emergence in extreme conditions and provides a reliable tool to predict the erosion and accretion processes controlling the evolution of small solar system bodies.
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EVOLUTION OF THE DUST SIZE DISTRIBUTION OF COMET 67P/CHURYUMOV–GERASIMENKO FROM 2.2 au TO PERIHELION. ACTA ACUST UNITED AC 2016. [DOI: 10.3847/0004-637x/821/1/19] [Citation(s) in RCA: 148] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Bibring JP, Langevin Y, Carter J, Eng P, Gondet B, Jorda L, Le Mouélic S, Mottola S, Pilorget C, Poulet F, Vincendon M. COMETARY SCIENCE. 67P/Churyumov-Gerasimenko surface properties as derived from CIVA panoramic images. Science 2015; 349:aab0671. [PMID: 26228154 DOI: 10.1126/science.aab0671] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The structure and composition of cometary constituents, down to their microscopic scale, are critical witnesses of the processes and ingredients that drove the formation and evolution of planetary bodies toward their present diversity. On board Rosetta's lander Philae, the Comet Infrared and Visible Analyser (CIVA) experiment took a series of images to characterize the surface materials surrounding the lander on comet 67P/Churyumov-Gerasimenko. Images were collected twice: just after touchdown, and after Philae finally came to rest, where it acquired a full panorama. These images reveal a fractured surface with complex structure and a variety of grain scales and albedos, possibly constituting pristine cometary material.
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Affiliation(s)
- J-P Bibring
- Institut d'Astrophysique Spatiale (IAS), CNRS/Université Paris Sud, Orsay, France.
| | - Y Langevin
- Institut d'Astrophysique Spatiale (IAS), CNRS/Université Paris Sud, Orsay, France
| | - J Carter
- Institut d'Astrophysique Spatiale (IAS), CNRS/Université Paris Sud, Orsay, France
| | - P Eng
- Institut d'Astrophysique Spatiale (IAS), CNRS/Université Paris Sud, Orsay, France
| | - B Gondet
- Institut d'Astrophysique Spatiale (IAS), CNRS/Université Paris Sud, Orsay, France
| | - L Jorda
- Laboratoire d'Astrophysique de Marseille (LAM), UMR7326,CNRS/INSU/Université Aix-Marseille, France
| | - S Le Mouélic
- Laboratoire Planétologie et Géodynamique, CNRS UMR6112 and Université de Nantes, Nantes, France
| | - S Mottola
- Deutschen Zentrum für Luft und Raumfahrt (DLR), Institute of Planetary Research, Berlin, Germany
| | - C Pilorget
- Institut d'Astrophysique Spatiale (IAS), CNRS/Université Paris Sud, Orsay, France
| | - F Poulet
- Institut d'Astrophysique Spatiale (IAS), CNRS/Université Paris Sud, Orsay, France
| | - M Vincendon
- Institut d'Astrophysique Spatiale (IAS), CNRS/Université Paris Sud, Orsay, France
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Biele J, Ulamec S, Maibaum M, Roll R, Witte L, Jurado E, Muñoz P, Arnold W, Auster HU, Casas C, Faber C, Fantinati C, Finke F, Fischer HH, Geurts K, Güttler C, Heinisch P, Herique A, Hviid S, Kargl G, Knapmeyer M, Knollenberg J, Kofman W, Kömle N, Kührt E, Lommatsch V, Mottola S, Pardo de Santayana R, Remetean E, Scholten F, Seidensticker KJ, Sierks H, Spohn T. COMETARY SCIENCE. The landing(s) of Philae and inferences about comet surface mechanical properties. Science 2015; 349:aaa9816. [PMID: 26228158 DOI: 10.1126/science.aaa9816] [Citation(s) in RCA: 190] [Impact Index Per Article: 21.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
The Philae lander, part of the Rosetta mission to investigate comet 67P/Churyumov-Gerasimenko, was delivered to the cometary surface in November 2014. Here we report the precise circumstances of the multiple landings of Philae, including the bouncing trajectory and rebound parameters, based on engineering data in conjunction with operational instrument data. These data also provide information on the mechanical properties (strength and layering) of the comet surface. The first touchdown site, Agilkia, appears to have a granular soft surface (with a compressive strength of 1 kilopascal) at least ~20 cm thick, possibly on top of a more rigid layer. The final landing site, Abydos, has a hard surface.
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Affiliation(s)
- Jens Biele
- Deutsches Zentrum für Luft- und Raumfahrt (DLR)/Raumflugbetrieb und Astronautentraining, Microgravity User Support Center (MUSC), Linder Höhe 1, 51147 Cologne, Germany
| | - Stephan Ulamec
- Deutsches Zentrum für Luft- und Raumfahrt (DLR)/Raumflugbetrieb und Astronautentraining, Microgravity User Support Center (MUSC), Linder Höhe 1, 51147 Cologne, Germany
| | - Michael Maibaum
- Deutsches Zentrum für Luft- und Raumfahrt (DLR)/Raumflugbetrieb und Astronautentraining, Microgravity User Support Center (MUSC), Linder Höhe 1, 51147 Cologne, Germany
| | - Reinhard Roll
- Max-Planck-Institut für Sonnensystemforschung (MPS), Justus-von-Liebig-Weg 3, 37077 Göttingen, Germany
| | - Lars Witte
- DLR/Institut für Raumfahrtsysteme, Robert Hooke-Straße 7, 28359 Bremen, Germany
| | - Eric Jurado
- Centre National d'Études Spatiales, 18 Avenue Édouard Belin, 31400 Toulouse, France
| | - Pablo Muñoz
- European Space Agency/European Space Operations Centre (ESA/ESOC), Robert-Bosch-Straße 5, 64293 Darmstadt, Germany. Grupo Mecánica de Vuelo at ESA/ESOC - GMV Robert-Bosch-Straße 5, 64293 Darmstadt, Germany
| | - Walter Arnold
- 1. Physikalisches Institut, Georg August Universität, 37077 Göttingen, Germany; permanent address: Department of Materials Science, Saarland University, 66123 Saarbrücken, Germany
| | - Hans-Ulrich Auster
- Institut für Geophysik und Extraterrestrische Physik, Technische Universität Braunschweig Mendelssohnstrasse 3, 38106 Braunschweig, Germany
| | - Carlos Casas
- European Space Agency/European Space Operations Centre (ESA/ESOC), Robert-Bosch-Straße 5, 64293 Darmstadt, Germany. Grupo Mecánica de Vuelo at ESA/ESOC - GMV Robert-Bosch-Straße 5, 64293 Darmstadt, Germany
| | - Claudia Faber
- DLR/Institut für Planetenforschung Rutherfordstraße 2, 12489 Berlin, Germany
| | - Cinzia Fantinati
- Deutsches Zentrum für Luft- und Raumfahrt (DLR)/Raumflugbetrieb und Astronautentraining, Microgravity User Support Center (MUSC), Linder Höhe 1, 51147 Cologne, Germany
| | - Felix Finke
- Deutsches Zentrum für Luft- und Raumfahrt (DLR)/Raumflugbetrieb und Astronautentraining, Microgravity User Support Center (MUSC), Linder Höhe 1, 51147 Cologne, Germany
| | - Hans-Herbert Fischer
- Deutsches Zentrum für Luft- und Raumfahrt (DLR)/Raumflugbetrieb und Astronautentraining, Microgravity User Support Center (MUSC), Linder Höhe 1, 51147 Cologne, Germany
| | - Koen Geurts
- Deutsches Zentrum für Luft- und Raumfahrt (DLR)/Raumflugbetrieb und Astronautentraining, Microgravity User Support Center (MUSC), Linder Höhe 1, 51147 Cologne, Germany
| | - Carsten Güttler
- Max-Planck-Institut für Sonnensystemforschung (MPS), Justus-von-Liebig-Weg 3, 37077 Göttingen, Germany
| | - Philip Heinisch
- Institut für Geophysik und Extraterrestrische Physik, Technische Universität Braunschweig Mendelssohnstrasse 3, 38106 Braunschweig, Germany
| | - Alain Herique
- Université Grenoble Alpes and CNRS, Institut de Planétologie et d'Astrophysique de Grenoble, F-38000 Grenoble, France
| | - Stubbe Hviid
- DLR/Institut für Planetenforschung Rutherfordstraße 2, 12489 Berlin, Germany
| | - Günter Kargl
- Institut für Weltraumforschung (IWF) Graz, Austria Austrian Academy of Sciences, Space Research Institute, Schmiedlstraße 6, 8042 Graz, Austria
| | - Martin Knapmeyer
- DLR/Institut für Planetenforschung Rutherfordstraße 2, 12489 Berlin, Germany
| | - Jörg Knollenberg
- DLR/Institut für Planetenforschung Rutherfordstraße 2, 12489 Berlin, Germany
| | - Wlodek Kofman
- Université Grenoble Alpes and CNRS, Institut de Planétologie et d'Astrophysique de Grenoble, F-38000 Grenoble, France
| | - Norbert Kömle
- Institut für Weltraumforschung (IWF) Graz, Austria Austrian Academy of Sciences, Space Research Institute, Schmiedlstraße 6, 8042 Graz, Austria
| | - Ekkehard Kührt
- DLR/Institut für Planetenforschung Rutherfordstraße 2, 12489 Berlin, Germany
| | - Valentina Lommatsch
- Deutsches Zentrum für Luft- und Raumfahrt (DLR)/Raumflugbetrieb und Astronautentraining, Microgravity User Support Center (MUSC), Linder Höhe 1, 51147 Cologne, Germany
| | - Stefano Mottola
- DLR/Institut für Planetenforschung Rutherfordstraße 2, 12489 Berlin, Germany
| | - Ramon Pardo de Santayana
- European Space Agency/European Space Operations Centre (ESA/ESOC), Robert-Bosch-Straße 5, 64293 Darmstadt, Germany. Grupo Mecánica de Vuelo at ESA/ESOC - GMV Robert-Bosch-Straße 5, 64293 Darmstadt, Germany
| | - Emile Remetean
- Centre National d'Études Spatiales, 18 Avenue Édouard Belin, 31400 Toulouse, France
| | - Frank Scholten
- DLR/Institut für Planetenforschung Rutherfordstraße 2, 12489 Berlin, Germany
| | | | - Holger Sierks
- Max-Planck-Institut für Sonnensystemforschung (MPS), Justus-von-Liebig-Weg 3, 37077 Göttingen, Germany
| | - Tilman Spohn
- DLR/Institut für Planetenforschung Rutherfordstraße 2, 12489 Berlin, Germany
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10
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Gibney E. Philae's comet discoveries create series of conundrums. Nature 2015. [DOI: 10.1038/nature.2015.18102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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