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Titlebook: Comets and the Origin of Life; Proceedings of the F Cyril Ponnamperuma Conference proceedings 1981 D. Reidel Publishing Company, Dordrecht,

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发表于 2025-3-21 19:49:37 | 显示全部楼层 |阅读模式
书目名称Comets and the Origin of Life
副标题Proceedings of the F
编辑Cyril Ponnamperuma
视频videohttp://file.papertrans.cn/231/230144/230144.mp4
丛书名称Proceedings of the College Park Colloquia
图书封面Titlebook: Comets and the Origin of Life; Proceedings of the F Cyril Ponnamperuma Conference proceedings 1981 D. Reidel Publishing Company, Dordrecht,
描述The return of Halley‘s Cornet in 1986 has generated much ex­ citement in the scientific community with preparations already afoot for an International Cornet Watch and a cornet launch by the European Space Community, the Japanese and Soviet Space Scientists. The meet­ ing held at the University of Maryland in October 1980 was primarily stimulated by the preparations for further study of this cornet and by one of the most important unanswered questions related to comets, name­ ly, whether they may have made a eontribution to the origin of life on earth. Our un"derstanding of the role of comets in the origin of life must necessarily come from our studies of the astronomy and the chem­ istry of comets. Some clues to the processes which led to the for­ mation of organic molecules and eventually to the appearance of life have come from these studies of comets, perhaps the most ancient of all objects in our solar system. Whether there is, however, a biology of comets still remains to be seen, although some claims have been made that perhaps comets might themselves provide an environment for even the beginnings of life. Scientists with the latest available information on comets and differ
出版日期Conference proceedings 1981
关键词Europe; atmosphere; biology; chemistry; environment; evolution; formation; isotope; solar system
版次1
doihttps://doi.org/10.1007/978-94-009-8528-5
isbn_softcover978-94-009-8530-8
isbn_ebook978-94-009-8528-5
copyrightD. Reidel Publishing Company, Dordrecht, Holland 1981
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Comet Nucleus: Some Characteristics and a Hypothesis on Origin and Structure,mets. These points will be followed by presentation of the problem of cosmic ray irradiation of comets in the long time they survive in the Oort Cloud. A more detailed discussion of this phenomenon, including an experimental investigation of ice irradiation by 1 MV proton, will be given by Marla Moo
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Ultraviolet Spectroscopy of Comets,l as several simple molecules made from these species have their strong resonance transitions in the ultraviolet region of the spectrum. However, due to the opacity of the atmosphere to ultraviolet, these observations must be made from space, and it was not until 1970 that the extensive HI Lyman α e
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Interplanetary Dust - Its Physical Nature and Entry into the Atmosphere of Terrestrial Planets,k, fine grained material similar to carbonaceous chondrites but different from known meteorites in mineralogy and structure. If the analyzed samples are typical interplanetary particles then they are probably cometary materials similar to the vast numbers of cometary particles which have continuousl
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Chemical Kinetics IM the Coma,are described and correlated to distance in the coma above the nucleus and to heliocentric distance of the comet. Two classes for the composition of comets are considered based on their place of origin: in the environs of the giant planets or in a companion fragment of the presolar nebula. Compariso
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,Chemical Evolution of Interstellar Dust — A Source of Prebiotic Material ?, cloud collapse (early pre-solar nebula) of complex non-volatile molecular mixtures of oxygen, carbon and nitrogen with hydrogen in addition to such volatile combinations as H.O, CO, etc. These constituents may be presumed to be the predominant constituents of a comet which accreted out of the inter
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