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Expanding the role of ultrasonography in cardiopulmonary assessment in dromedary camels. [PDF]
Front Vet SciTharwat M.
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MRI-Based Differentiation of Tumor Deposits and Lymph Node Metastases in Rectal Cancer: A Systematic Review of Diagnostic Performance. [PDF]
J Clin MedStefan PA +7 more
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Celestial Mechanics and Dynamical Astronomy, 1992
Reasons for interest in the origin of short-period comets and the difficulties of computing their long-term dynamical evolution are reviewed. The relative advantages of a source region in an extended ‘inner core’ of the Oort cloud or a compact ‘comet belt‘ just beyond the planetary system are finely balanced, and it is premature to consider the problem
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Reasons for interest in the origin of short-period comets and the difficulties of computing their long-term dynamical evolution are reviewed. The relative advantages of a source region in an extended ‘inner core’ of the Oort cloud or a compact ‘comet belt‘ just beyond the planetary system are finely balanced, and it is premature to consider the problem
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A D/H ratio consistent with Earth’s water in Halley-type comet 12P from ALMA HDO mapping
Nature AstronomyIsotopic measurements of Solar System bodies provide a primary paradigm within which to understand the origins and histories of planetary materials. The deuterium-to-hydrogen (D/H) ratio, in particular, helps reveal the relationship between (and heritage
M. Cordiner +20 more
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International Journal of Astrobiology, 2007
AbstractMechanisms of interstellar panspermia have recently been identified whereby life, wherever it has originated, will disperse throughout the habitable zone of the Galaxy within a few billion years. This re-opens the question of where life originated.
W.M. Napier +2 more
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AbstractMechanisms of interstellar panspermia have recently been identified whereby life, wherever it has originated, will disperse throughout the habitable zone of the Galaxy within a few billion years. This re-opens the question of where life originated.
W.M. Napier +2 more
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International Astronomical Union Colloquium, 1976
The cosmogony of the planetary and satellite systems consists of understanding the physio-chemical processes leading to their formation and also trying to decide at what time and over what period their formation took place. The cosmogony of the comets require answers to not only these two questions but also as to where, in relation to the solar system,
Asoka Mendis, Hannes Alfvén
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The cosmogony of the planetary and satellite systems consists of understanding the physio-chemical processes leading to their formation and also trying to decide at what time and over what period their formation took place. The cosmogony of the comets require answers to not only these two questions but also as to where, in relation to the solar system,
Asoka Mendis, Hannes Alfvén
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Nature, 1973
IN so many fields of astrophysics the textbooks and the ordinary review articles have a tendency to present only the ‘generally accepted’ point of view, often not mentioning alternative theories, and even sweeping under the rug those observational facts which are adverse to the dominant view. This also applies to the theory of comets. As the arrival of
HANNES ALFVÉN, ASOKA MENDIS
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IN so many fields of astrophysics the textbooks and the ordinary review articles have a tendency to present only the ‘generally accepted’ point of view, often not mentioning alternative theories, and even sweeping under the rug those observational facts which are adverse to the dominant view. This also applies to the theory of comets. As the arrival of
HANNES ALFVÉN, ASOKA MENDIS
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Origin and evolution of comets
International Astronomical Union Colloquium, 1974AbstractA Monte Carlo study is described that leads to an understanding of the evolution of comets, particularly how the short-period comets can arise. Some results have appeared in the March 1972 issue of Astrophysical Letters, Vol. 10, pages 131–135 (Paper I), but further results are presented here for the first time.This is a report of a particular ...
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Reports on Progress in Physics, 1983
After an introduction to the basic history and morphology of comets, the authors consider cometary motion, the physical properties of the neutral gaseous matter, the nucleus, dust particles, cometary ion origin and interactions with the solar wind, the origin of comets, the relation of comets to other astrophysical bodies and the origin of life.
J A Fernandez, K Jockers
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After an introduction to the basic history and morphology of comets, the authors consider cometary motion, the physical properties of the neutral gaseous matter, the nucleus, dust particles, cometary ion origin and interactions with the solar wind, the origin of comets, the relation of comets to other astrophysical bodies and the origin of life.
J A Fernandez, K Jockers
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