標題: Titlebook: Comets and the Origin and Evolution of Life; Paul J. Thomas,Christopher F. Chyba,Christopher P. Book 19971st edition Springer Science+Busi [打印本頁] 作者: Interjection 時間: 2025-3-21 16:57
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作者: DEAF 時間: 2025-3-21 22:42
Marina Fischer-Kowalski,Helga Weisz particular challenge for comet missions is a rendezvous with a new comet as it enters the planetary region for the first time. The planned Rosetta mission with the surface landers Champollion and Roland promise to greatly expand our knowledge of comets.作者: PAGAN 時間: 2025-3-22 01:01
Comets as a Source of Prebiotic Organic Molecules for the Early Earth,thesizing them in impacts. In an early carbon dioxide-rich terrestrial atmosphere, these mechanisms would have quantitatively rivaled or exceeded terrestrial organic synthesis in situ. In an early reducing (methane-rich) atmosphere, the exogenous sources would have been quantitatively unimportant compared to atmospheric production.作者: 軟弱 時間: 2025-3-22 08:33
Comets and Space Missions, particular challenge for comet missions is a rendezvous with a new comet as it enters the planetary region for the first time. The planned Rosetta mission with the surface landers Champollion and Roland promise to greatly expand our knowledge of comets.作者: 錯 時間: 2025-3-22 11:58 作者: Benzodiazepines 時間: 2025-3-22 15:39 作者: Benzodiazepines 時間: 2025-3-22 20:24 作者: 確認 時間: 2025-3-23 00:55 作者: Confess 時間: 2025-3-23 03:30
Introduction: Comets and the Origin of Life,ory of our planet. There is still much to learn, despite recent progress in our knowledge of such fundamental issues as the nature of organic chemical processes in space, the chemistry of comets and asteroids and the nature of the early terrestrial environment.作者: heckle 時間: 2025-3-23 08:39
26Al and Liquid Water Environments in Comets,uction through the ice, and heat carried by the flow of gas through the porous nucleus. The most recent models show that conditions for producing liquid water can be achieved only under rather contrived circumstances.作者: reflection 時間: 2025-3-23 11:09 作者: 觀點 時間: 2025-3-23 16:04
impacts on Earth. The book is intended as a comprehensive review of current research, accessible to graduate students and others new to the field. Each chapter was prepared by an expert to give an overview of an aspect of the field, and carefully revised by the editors for uniformity in style and presentation.978-1-4757-2688-6作者: arrhythmic 時間: 2025-3-23 21:05 作者: PLIC 時間: 2025-3-24 00:58
Marina Fischer-Kowalski,Karl-Heinz Erbuction through the ice, and heat carried by the flow of gas through the porous nucleus. The most recent models show that conditions for producing liquid water can be achieved only under rather contrived circumstances.作者: 只有 時間: 2025-3-24 05:43
Organic Chemistry in Comets From Remote and In Situ Observations,me the European Space Agency (ESA) has dedicated its next major mission, Rosetta, to perform a comet rendezvous..A time-of-flight secondary ion mass spectrometer (CoMA) can provide much higher mass resolution up to molecule masses of some 3000 Da.作者: 季雨 時間: 2025-3-24 08:34
Polymers and Other Macromolecules in Comets,e dust that must have existed in the solar nebula at the time and place of comet formation. We show that complex organic molecules found in comets may be a source of the prebiotic molecules that led to the origins of life and may include some biologically important compounds that did not form by abi作者: 使痛苦 時間: 2025-3-24 13:17 作者: strain 時間: 2025-3-24 17:15 作者: 供過于求 時間: 2025-3-24 22:07 作者: 有特色 時間: 2025-3-25 02:35
Paul J. Thomas,Christopher F. Chyba,Christopher P.作者: forthy 時間: 2025-3-25 03:25 作者: Fibrin 時間: 2025-3-25 10:10 作者: Hemoptysis 時間: 2025-3-25 14:33
Underworld and the Police in Mumbai, cyclicity is, in fact, ~15 Myr. An alternative (which does not explain the 250 Myr cycle) is the solar companion star or “Nemesis” theory, invoking Oort cloud disturbances when this hypothetical star passes perihelion every 30 Myr. The fact that the biosphere may be significantly affected by comets作者: DENT 時間: 2025-3-25 18:07 作者: Fecundity 時間: 2025-3-25 21:13 作者: muscle-fibers 時間: 2025-3-26 01:01
https://doi.org/10.1007/978-1-4757-2688-6asteroid; atmosphere; biosphere; chemistry; earth; environment; evolution; liquid water; organic chemistry; o作者: Limited 時間: 2025-3-26 05:34
Springer Science+Business Media New York 1997作者: NEX 時間: 2025-3-26 11:03 作者: CEDE 時間: 2025-3-26 16:27
https://doi.org/10.1007/978-3-319-92555-4iosphere: they were both deliverers of organic material and volatiles, and also destroyers of organic material, by the heat and shock of violent impact. The study of the origins of life on Earth attempts to uncover the physical processes operating during this earliest, very turbulent era in the hist作者: olfction 時間: 2025-3-26 20:40
Mario Lucchini,Sara Della Bellaem since its formation provide a unique source to study such genuine material..When the VEGA and GIOTTO spacecrafts flew by comet P/Halley in 1986 the mass-spectrometers Puma and PIA measured the composition of cometary dust particles impacting at speeds of well above 65 km s.. Ion formation upon im作者: 移動 時間: 2025-3-26 22:13 作者: miracle 時間: 2025-3-27 03:48
Jennifer Fitzgerald,Christopher Jordearly Earth. Results from these simulations imply that it is possible for a fraction of the extraterrestrial organic material to survive the high temperatures occurring during the impact (and thus contribute prebiotic material to the early Earth). Recent models for atmospheric passage, however, predi作者: lymphoma 時間: 2025-3-27 08:55
Mario Lucchini,Sara Della Bellaem, was subjected to an intense bombardment of comets and asteroids. This bombardment may have rendered the Earth’s surface inhospitable for life for hundreds of millions of years subsequent to terrestrial formation. It may also have delivered to the Earth’s surface the bulk of the current terrestri作者: N防腐劑 時間: 2025-3-27 11:21
Underworld and the Police in Mumbai,idence includes impact craters formed close to boundary events, iridium and other siderophile element/isotope anomalies, microtektites, and shocked quartz. Mass extinctions, crater excavations, and various geologic upheavals all seem to follow a common periodicity of ~30 Myr. Another cycle of ~250 M作者: libertine 時間: 2025-3-27 14:49 作者: 憤世嫉俗者 時間: 2025-3-27 20:32
Marina Fischer-Kowalski,Karl-Heinz Erbhe relevant processes has improved, conclusions have changed. We review the different computations performed in the past, and discuss the effects of heating by radioactives in general, .Al in particular, and the phase transition from amorphous to crystalline ice. Cooling mechanisms include heat cond作者: Amenable 時間: 2025-3-28 00:29 作者: N斯巴達人 時間: 2025-3-28 06:06
Marina Fischer-Kowalski,Helga Weisze accomplished with flyby missions. More detailed study will require missions that rendezvous with comets, possibly attaching to them, and fly with them through perihelion passage, including a large segment of the orbit, so that changes in comet activity can be studied. Ultimately, a sample of comet作者: 慌張 時間: 2025-3-28 07:20 作者: FAST 時間: 2025-3-28 12:26
Social Drivers In Food TechnologyThe atmosphere of the Earth, its oceans as well as most carbon contained in its carbonates and in organic matter, seem to have been brought by a large bombardment of comets that lasted almost one billion years before diminishing drastically to its present-day value.作者: 生來 時間: 2025-3-28 17:35 作者: 漂白 時間: 2025-3-28 20:42
Comets and the Origin and Evolution of Life,The historical development of the study of comets and the origins of life is reviewed.作者: GULF 時間: 2025-3-29 02:22
The Origin of the Atmosphere and of the Oceans,The atmosphere of the Earth, its oceans as well as most carbon contained in its carbonates and in organic matter, seem to have been brought by a large bombardment of comets that lasted almost one billion years before diminishing drastically to its present-day value.作者: 言行自由 時間: 2025-3-29 05:47 作者: Absenteeism 時間: 2025-3-29 11:03
Introduction: Comets and the Origin of Life,iosphere: they were both deliverers of organic material and volatiles, and also destroyers of organic material, by the heat and shock of violent impact. The study of the origins of life on Earth attempts to uncover the physical processes operating during this earliest, very turbulent era in the hist作者: 技術(shù) 時間: 2025-3-29 14:07 作者: Bereavement 時間: 2025-3-29 18:36 作者: micturition 時間: 2025-3-29 23:41 作者: 疏忽 時間: 2025-3-30 03:10
Comets as a Source of Prebiotic Organic Molecules for the Early Earth,em, was subjected to an intense bombardment of comets and asteroids. This bombardment may have rendered the Earth’s surface inhospitable for life for hundreds of millions of years subsequent to terrestrial formation. It may also have delivered to the Earth’s surface the bulk of the current terrestri作者: formula 時間: 2025-3-30 06:40
Cometary Impacts on the Biosphere,idence includes impact craters formed close to boundary events, iridium and other siderophile element/isotope anomalies, microtektites, and shocked quartz. Mass extinctions, crater excavations, and various geologic upheavals all seem to follow a common periodicity of ~30 Myr. Another cycle of ~250 M作者: fidelity 時間: 2025-3-30 08:52
The Contemporary Hazard of Cometary Impacts, range from about 10 megatons of TNT up to the size of the K/T impactor. The lower threshold for damage is defined by the atmosphere of the Earth, which effectively shields us from smaller projectiles. Up to energies of about a gigaton of TNT, the effects are local or regional for impacts on the lan
