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General Relativistic Study of Motion of Comets Particles Elliptical Gravitational Field [PDF]
Physics AccessComets are small bodies consisting of aggregates of ice mixed with rock and dust. They are usually influenced by galactic forces and stellar encounters, and may have contributed to the formation of ice giants and transport gases across the solar system ...
Timothy Bulus +3 more
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Properties of mass-loading shocks, 2. Magnetohydrodynamics
, 1992 The one-dimensional magnetohydrodynamics of shocked flows subjected to significant mass loading are considered. Recent observations at comets Giacobini-Zinner and Halley suggest that simple nonreacting MHD is an inappropriate description for active ...
Oughton, Sean +3 more
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A Predicted Dearth of Majority Hypervolatile Ices in Oort Cloud Comets
, 2022 International audienceWe present new, ice species-specific New Horizons/Alice upper gas coma production limits from the 2019 January 1 MU69/Arrokoth flyby of Gladstone et al. and use them to make predictions about the rarity of majority hypervolatile (CO,
Grundy, W. M. +32 more
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Assessment of early-modern observations of comets and supernovae: Focus on pre-telescopic European astrometric and physical data [PDF]
, 2004 The two-century period prior to the publication of Newton's Principia (first edition 1687; third edition 1726) was most important in terms of the radical changes that occurred in the observation, perception, and understanding of celestial objects that in
Green, Daniel W. E., Green, Daniel W E
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The reliability of early East Asian astronomical records [PDF]
, 2003 The large body of observations extant from pre-telescopic East Asia - China, Japan and Korea - provide the opportunity to investigate the behaviour of the Sun and solar system over a much longer period of time than that since telescopic observations ...
York, Thomas John
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CHAPTER 8: Comets, Do They Have a Role in Prebiotic Photochemistry?
, 2021 Do comets have a role in prebiotic photochemistry? Yes, it is highly probable that comets, especially the dust which constitutes these beautiful objects that populate our planetary system and probably others, do play a key role in prebiotic ...
Balucani N. +7 more
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Molecular hydrogen in galaxies [PDF]
, 1987 This study aims to understand the key role played by molecular hydrogen in the evolution of galaxies, with a view to constraining its radial distribution in the Galaxy and the CO→H(_2) conversion factor α(_20).The star formation rate is shown to be ...
Wilkinson, David Adam, Wilkinson, D.A
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A survey on the distant activity of short period comets
, 2009 Aims. The aim of this paper is to build up an inventory of observations of short period comets (SPCs) far from the Sun, and perform an analysis of general properties of the family, investigating the link between distant activity and present and ...
P. Palumbo +2 more
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Dust colors, dust release rates, and dust-to-gas ratios in the comae of six comets
, 1996 In an attempt to find correlations between properties of comets, we determine the dust colors, dust release rates, and dust-to-gas mass ratios in the comae of Comets Bowell (1980 b = 1982 I), Bradfield (1979 l = 1979 X), Brorsen-Metcalf (1989 o = 1989 X),
P. D. Singh +2 more
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On two groups of periodic comets
, 1990 Приведены результаты дополнительного исследования двух групп комет, обнаруженных в |2|. Установлены следующие их различия: 1) орбиты комет второй группы в среднем более вытянутые; 2) распределения i существенно различаются; 3) различны значения константы
Гулиев, А.С.
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