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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nt 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 differ978-94-009-8530-8978-94-009-8528-5

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The Nature of Comets,s. Review of more evidence regarding bursts, splitting, jets, halos, dust and the basic structure of comets will center around the question of radioactive heating, possible exothermic reactions, and internal structure. This is relevant to suggestions concerning the development of life forms in comet

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Ultraviolet Spectroscopy of Comets,he observations of comet Bradfield, made with the orbiting International Ultraviolet Explorer, were the first to span a wide range of heliocentric distance (0.7 to 1.5 a.u.). The results of these observations and their interpretation are reviewed in terms of their contribution to our understanding o

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Interaction of Comets with the Interplanetary Medium,nt at other times..At all times the outflowing cometary ions are decelerated and diverted into the tail by a strong “inner” shock which is also of a variable nature. When the cometary neutrals cannot penetrate the ionopause, this inner shock is of a special type. It becomes a hybrid “ion-neutral” sh

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Are Comets Connected to the Origin of Life?,h interstellar molecules suggests that there is an extremely close connection - and probable identity - between interstellar “frost” and cometary snows. Although the origin of the solar system is far from being clearly understood, probable scenarios link interstellar frosty grains and comets. Isotop

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Redundant

Social Economics: Retrospect and Prospecty entered the Earth’s atmosphere for the lifetime of the solar system. If comets do not contain large strong rocks capable of producing conventional meteorites then dust is the only form in which organic materials from comets can be accreted by the Earth.

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