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El-Maarry MR, Groussin O, Thomas N, et al. Surface changes on comet 67P/Churyumov-Gerasimenko suggest a more active past. Science. 2017;355(6332):1392-1395doi: 10.1126/science.aak9384.
El-Maarry, M. R., Groussin, O., Thomas, N., Pajola, M., Auger, A. T., Davidsson, B., Hu, X., Hviid, S. F., Knollenberg, J., Güttler, C., Tubiana, C., Fornasier, S., Feller, C., Hasselmann, P., Vincent, J. B., Sierks, H., Barbieri, C., Lamy, P., Rodrigo, R., Koschny, D., Keller, H. U., Rickman, H., A'Hearn, M. F., Barucci, M. A., Bertaux, J. L., Bertini, I., Besse, S., Bodewits, D., Cremonese, G., Da Deppo, V., Debei, S., De Cecco, M., Deller, J., Deshapriya, J. D., Fulle, M., Gutierrez, P. J., Hofmann, M., Ip, W. H., Jorda, L., Kovacs, G., Kramm, J. R., Kührt, E., Küppers, M., Lara, L. M., Lazzarin, M., Lin, Z. Y., Lopez Moreno, J. J., Marchi, S., Marzari, F., Mottola, S., Naletto, G., Oklay, N., Pommerol, A., Preusker, F., Scholten, F., & Shi, X. (2017). Surface changes on comet 67P/Churyumov-Gerasimenko suggest a more active past. Science (New York, N.Y.), 355(6332), 1392-1395. https://doi.org/10.1126/science.aak9384
El-Maarry, M Ramy, et al. "Surface changes on comet 67P/Churyumov-Gerasimenko suggest a more active past." Science (New York, N.Y.) vol. 355,6332 (2017): 1392-1395. doi: https://doi.org/10.1126/science.aak9384
El-Maarry MR, Groussin O, Thomas N, Pajola M, Auger AT, Davidsson B, Hu X, Hviid SF, Knollenberg J, Güttler C, Tubiana C, Fornasier S, Feller C, Hasselmann P, Vincent JB, Sierks H, Barbieri C, Lamy P, Rodrigo R, Koschny D, Keller HU, Rickman H, A'Hearn MF, Barucci MA, Bertaux JL, Bertini I, Besse S, Bodewits D, Cremonese G, Da Deppo V, Debei S, De Cecco M, Deller J, Deshapriya JD, Fulle M, Gutierrez PJ, Hofmann M, Ip WH, Jorda L, Kovacs G, Kramm JR, Kührt E, Küppers M, Lara LM, Lazzarin M, Lin ZY, Lopez Moreno JJ, Marchi S, Marzari F, Mottola S, Naletto G, Oklay N, Pommerol A, Preusker F, Scholten F, Shi X. Surface changes on comet 67P/Churyumov-Gerasimenko suggest a more active past. Science. 2017 Mar 31;355(6332):1392-1395. doi: 10.1126/science.aak9384. Epub 2017 Mar 21. PMID: 28325842.
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Science. 2017 Mar 31;355(6332):1392-1395. doi: 10.1126/science.aak9384. Epub 2017 Mar 21.

Surface changes on comet 67P/Churyumov-Gerasimenko suggest a more active past.

Science (New York, N.Y.)

M Ramy El-Maarry, O Groussin, N Thomas, M Pajola, A-T Auger, B Davidsson, X Hu, S F Hviid, J Knollenberg, C Güttler, C Tubiana, S Fornasier, C Feller, P Hasselmann, J-B Vincent, H Sierks, C Barbieri, P Lamy, R Rodrigo, D Koschny, H U Keller, H Rickman, M F A'Hearn, M A Barucci, J-L Bertaux, I Bertini, S Besse, D Bodewits, G Cremonese, V Da Deppo, S Debei, M De Cecco, J Deller, J D P Deshapriya, M Fulle, P J Gutierrez, M Hofmann, W-H Ip, L Jorda, G Kovacs, J-R Kramm, E Kührt, M Küppers, L M Lara, M Lazzarin, Z-Yi Lin, J J Lopez Moreno, S Marchi, F Marzari, S Mottola, G Naletto, N Oklay, A Pommerol, F Preusker, F Scholten, X Shi

Affiliations

  1. Physikalisches Institut, Universität Bern, 3012 Bern, Switzerland. [email protected].
  2. Laboratory for Atmospheric and Space Physics, University of Colorado, Boulder, CO 80301, USA.
  3. Aix Marseille Université, CNRS, Laboratoire d'Astrophysique de Marseille, UMR 7326, 13388 Marseille, France.
  4. Physikalisches Institut, Universität Bern, 3012 Bern, Switzerland.
  5. NASA Ames Research Center, Moffett Field, CA 94035, USA.
  6. Jet Propulsion Laboratory, Pasadena, CA 91109, USA.
  7. Max-Planck-Institut für Sonnensystemforschung, 37077 Göttingen, Germany.
  8. Deutsches Zentrum für Luft- und Raumfahrt (DLR), Institut für Planetenforschung, 12489 Berlin, Germany.
  9. LESIA, Observatoire de Paris, PSL Research University, CNRS, Université Paris Diderot, Sorbonne Paris Cité, UPMC Université Paris 06, Sorbonne Universités, Meudon Principal Cedex 92195, France.
  10. Department of Physics and Astronomy, University of Padova, 35122 Padova, Italy.
  11. Laboratoire d'Astrophysique de Marseille, UMR 7326 CNRS & Université Aix-Marseille, 13388 Marseille Cedex 13, France.
  12. Centro de Astrobiología, Instituto Nacional de Técnica Aeroespacial, 28850 Torrejón de Ardoz, Madrid, Spain.
  13. International Space Science Institute, 3012 Bern, Switzerland.
  14. Operations Department, European Space Astronomy Centre/ESA, P.O. Box 78, 28691 Villanueva de la Cañada, Madrid, Spain.
  15. Institut für Geophysik und Extraterrestrische Physik, Technische Universität Braunschweig, 38106 Braunschweig, Germany.
  16. Department of Physics and Astronomy, Uppsala University, Box 516, 75120 Uppsala, Sweden.
  17. Polish Academy of Sciences, Space Research Center, 00716 Warsaw, Poland.
  18. Department of Astronomy, University of Maryland, College Park, MD 20742, USA.
  19. Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), CNRS-Université de Versailles Saint-Quentin-en-Yvelines-Institut Pierre Simon Laplace, 78280 Guyancourt, France.
  20. Istituto Nazionale di Astrofisica, Osservatorio Astronomico di Padova, 35122 Padova, Italy.
  21. Consiglio Nazionale delle Ricerche-Istituto di Fotonica e Nanotecnologie, Unità Organizzativa di Supporto, Padova Luxor, 35131 Padova, Italy.
  22. Department of Industrial Engineering, University of Padova, 35131 Padova, Italy.
  23. University of Trento, 38123 Trento, Italy.
  24. INAF, Osservatorio Astronomico di Trieste, 34014 Trieste, Italy.
  25. Instituto de Astrofísica de Andalucía (CSIC), c/ Glorieta de la Astronomía s/n, 18008 Granada, Spain.
  26. Graduate Institute of Astronomy, National Central University, Chung-Li 32054, Taiwan.
  27. Solar System Exploration Research, Virtual Institute, Southwest Research Institute, Boulder, CO 80302, USA.
  28. Department of Information Engineering, University of Padova, 35131 Padova, Italy.
  29. Centro di Ateneo di Studi ed Attivitá Spaziali "Giuseppe Colombo" (CISAS), University of Padova, 35131 Padova, Italy.

PMID: 28325842 DOI: 10.1126/science.aak9384

Abstract

The Rosetta spacecraft spent ~2 years orbiting comet 67P/Churyumov-Gerasimenko, most of it at distances that allowed surface characterization and monitoring at submeter scales. From December 2014 to June 2016, numerous localized changes were observed, which we attribute to cometary-specific weathering, erosion, and transient events driven by exposure to sunlight and other processes. While the localized changes suggest compositional or physical heterogeneity, their scale has not resulted in substantial alterations to the comet's landscape. This suggests that most of the major landforms were created early in the comet's current orbital configuration. They may even date from earlier if the comet had a larger volatile inventory, particularly of CO or CO

Copyright © 2017, American Association for the Advancement of Science.

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