{"refrec":{"BRefID":208838,"RR":"<b>Hartogh, P.; Lis, D.C.; Bockelée-Morvan, D.; de Val-Borro, M.; Biver, N.; Küppers, M.; Emprechtinger, M.; Bergin, E.A.; Crovisier, J.; Rengel, M.; Moreno, R.; Szutowicz, S.; Blake, G.A.</b> (2011). Ocean-like water in the Jupiter-family comet 103P/Hartley 2. <i>Nature (Lond.) 478(7368)</i>: 218-220. <a href=\"https://dx.doi.org/10.1038/nature10519\" target=\"_blank\">https://dx.doi.org/10.1038/nature10519</a>","BEntID":200826,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":1,"RefStringPartII":". <i>Nature (Lond.) 478(7368)</i>: 218-220. <a href=\"https://dx.doi.org/10.1038/nature10519\" target=\"_blank\">https://dx.doi.org/10.1038/nature10519</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Hartogh, P.; Lis, D.C.; Bockelée-Morvan, D.; de Val-Borro, M.; Biver, N.; Küppers, M.; Emprechtinger, M.; Bergin, E.A.; Crovisier, J.; Rengel, M.; Moreno, R.; Szutowicz, S.; Blake, G.A.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Hartogh, P. <i>et al.</i>","Englishabstract":"For decades, the source of Earth's volatiles, especially water with a deuterium-to-hydrogen ratio (D/H) of (1.558 +/- 0.001) x 10(-4), has been a subject of debate. The similarity of Earth's bulk composition to that of meteorites known as enstatite chondrites(1) suggests a dry proto-Earth(2) with subsequent delivery of volatiles(3) by local accretion(4) or impacts of asteroids or comets(5,6). Previous measurements in six comets from the Oort cloud yielded a mean D/H ratio of (2.96 +/- 0.25) x 10(-4). The D/H value in carbonaceous chondrites, (1.4 +/- 0.1) x 10(-4), together with dynamical simulations, led to models in which asteroids were the main source of Earth's water(7), with <= 10 per cent being delivered by comets. Here we report that the D/H ratio in the Jupiter-family comet 103P/Hartley 2, which originated in the Kuiper belt, is (1.61 +/- 0.24) x 10(-4). This result substantially expands the reservoir of Earth ocean-like water to include some comets, and is consistent with the emerging picture of a complex dynamical evolution of the early Solar System(8,9).","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Ocean-like water in the Jupiter-family comet 103P/Hartley 2","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2026-06-11 01:31:44.441752","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":null,"OtherDescriptors":null,"Notes":null,"AnaPub":2011,"MonPub":null,"DateUpdate":"2018-02-13","DateCreate":"2011-10-21","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000295782800044","VABBcode":null,"OpenAcc":0,"DOI":"10.1038/nature10519"},"refs":null,"anarec":{"AnaID":208838,"PubliDate":2011,"Pagination":"218-220","XtraPublOfAnaID":null,"ISBN":null,"Volume":"478","Issue":"7368","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":43431,"SerRR":"Nature: International Weekly Journal of Science. 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