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DOI | 10.1126/science.aak9384 |
Surface changes on comet 67P/Churyumov-Gerasimenko suggest a more active past | |
Ramy El-Maarry M.; 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.P.; 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.; Yi Lin Z.; Lopez Moreno J.J.; Marchi S.; Marzari F.; Mottola S.; Naletto G.; Oklay N.; Pommerol A.; Preusker F.; Scholten F.; Shi X. | |
发表日期 | 2017 |
ISSN | 0036-8075 |
卷号 | 355期号:6332 |
英文摘要 | 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 CO2 ices, or contained amorphous ice, which could have triggered activity at greater distances from the Sun. |
英文关键词 | comet; heterogeneity; inventory; landform; landscape change; monitoring; monitoring system; radiation exposure; solar radiation; solar system; spacecraft; weathering; Article; astronomy; evolution; history; Northern Hemisphere; priority journal; space; space flight; sun; surface property; velocity |
语种 | 英语 |
来源期刊 | Science |
文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/245171 |
作者单位 | Physikalisches Institut, Universität Bern, Bern, 3012, Switzerland; Laboratory for Atmospheric and Space Physics, University of Colorado, Boulder, CO 80301, United States; Aix Marseille Université, CNRS, Laboratoire D'Astrophysique de Marseille, UMR 7326, Marseille, 13388, France; NASA Ames Research Center, Moffett Field, CA 94035, United States; Jet Propulsion Laboratory, Pasadena, CA 91109, United States; Max-Planck-Institut Für Sonnensystemforschung, Göttingen, 37077, Germany; Deutsches Zentrum Für Luft-und Raumfahrt (DLR), Institut Für Planetenforschung, Berlin, 12489, Germany; 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; Department of Physics and Astronomy, University of Padova, Padova, 35122, Italy; Laboratoire D'Astrophysique de Marseille, UMR 7326 CNRS, Université Aix-Marseille, Marseille Cedex 13, 13388, France; Centro de Astrobiología, Instituto... |
推荐引用方式 GB/T 7714 | Ramy El-Maarry M.,Groussin O.,Thomas N.,et al. Surface changes on comet 67P/Churyumov-Gerasimenko suggest a more active past[J],2017,355(6332). |
APA | Ramy El-Maarry M..,Groussin O..,Thomas N..,Pajola M..,Auger A.-T..,...&Shi X..(2017).Surface changes on comet 67P/Churyumov-Gerasimenko suggest a more active past.Science,355(6332). |
MLA | Ramy El-Maarry M.,et al."Surface changes on comet 67P/Churyumov-Gerasimenko suggest a more active past".Science 355.6332(2017). |
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