气候变化领域集成服务门户(CCPortal): Surface changes on comet 67P/Churyumov-Gerasimenko suggest a more active past

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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).