{"refrec":{"BRefID":295836,"RR":"<b>Altwegg, K.; Balsiger, H.; Bar-Nun, A.; Berthelier, J.J.; Bieler, A.; Bochsler, P.; Briois, C.; Calmonte, U.; Combi, M.; De Keyser, J.; Eberhardt, P.; Fiethe, B.; Fuselier, S.; Gasc, S.; Gombosi, T.I.; Hansen, K.C.; Hassig, M.; Jackel, A.; Kopp, E.; Korth, A.; Leroy, L.; Mall, U.; Marty, B.; Mousis, O.; Neefs, E.; Owen, T.; Reme, H.; Rubin, M.; Semon, T.; Tzou, C.-Y.; Waite, H.; Wurz, P.</b> (2015). 67P/Churyumov-Gerasimenko, a Jupiter family comet with a high D/H ratio. <i>Science (Wash.) 347(6220)</i>: 3. <a href=\"https://dx.doi.org/10.1126/science.1261952\" target=\"_blank\">https://dx.doi.org/10.1126/science.1261952</a>","BEntID":287924,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":1,"RefStringPartII":". <i>Science (Wash.) 347(6220)</i>: 3. <a href=\"https://dx.doi.org/10.1126/science.1261952\" target=\"_blank\">https://dx.doi.org/10.1126/science.1261952</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":0,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Altwegg, K.; Balsiger, H.; Bar-Nun, A.; Berthelier, J.J.; Bieler, A.; Bochsler, P.; Briois, C.; Calmonte, U.; Combi, M.; De Keyser, J.; Eberhardt, P.; Fiethe, B.; Fuselier, S.; Gasc, S.; Gombosi, T.I.; Hansen, K.C.; Hassig, M.; Jackel, A.; Kopp, E.; Korth, A.; Leroy, L.; Mall, U.; Marty, B.; Mousis, O.; Neefs, E.; Owen, T.; Reme, H.; Rubin, M.; Semon, T.; Tzou, C.-Y.; Waite, H.; Wurz, P.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Altwegg, K. <i>et al.</i>","Englishabstract":"The provenance of water and organic compounds on Earth and other terrestrial planets has been discussed for a long time without reaching a consensus. One of the best means to distinguish between different scenarios is by determining the deuterium-to-hydrogen (D/H) ratios in the reservoirs for comets and Earth’s oceans. Here, we report the direct in situ measurement of the D/H ratio in the Jupiter family comet 67P/Churyumov-Gerasimenko by the ROSINA mass spectrometer aboard the European Space Agency’s Rosetta spacecraft, which is found to be (5.3 ± 0.7) × 10<sup>−4</sup>—that is, approximately three times the terrestrial value. Previous cometary measurements and our new finding suggest a wide range of D/H ratios in the water within Jupiter family objects and preclude the idea that this reservoir is solely composed of Earth ocean–like water.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"67P/Churyumov-Gerasimenko, a Jupiter family comet with a high D/H ratio","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2026-04-23 01:32:48.850618","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":null,"OtherDescriptors":null,"Notes":null,"AnaPub":2015,"MonPub":null,"DateUpdate":"2022-12-07","DateCreate":"2018-05-15","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000348225800030","VABBcode":null,"OpenAcc":0,"DOI":"10.1126/science.1261952"},"refs":null,"anarec":{"AnaID":295836,"PubliDate":2015,"Pagination":"3","XtraPublOfAnaID":null,"ISBN":null,"Volume":"347","Issue":"6220","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":43776,"SerRR":"Science (Washington). 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