Titlebook: Origin and Early Evolution of Comet Nuclei; Workshop honouring J H. Balsiger,K. Altwegg,R. Schulz Book 2008 Springer-Verlag New York 2008 P

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Loss of the Surface Layers of Comet Nuclei,acecraft at comet 67P/Churyumov-Gerasimenko. While sub-surface sublimation is necessary to explain the observations, the depth at which this occurs is no more than 2–3 cm and possibly less. The low thermal conductivity when combined with local surface roughness (also observed with Deep Impact) impli

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Comet Knudsen Layers,weak and strong evaporation problems in two-surface, half-space, and spherical geometries. Furthermore, the application of such results in cometary science is reviewed. In order to illustrate some properties of the half-space evaporation problem for water ice surfaces at temperatures relevant for ac

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Deep Impact and the Origin and Evolution of Cometary Nuclei,ypical. In addition to the properties revealed by the impact itself, numerous properties were also discovered from observations prior to the impact just because they were the types of observations that had never been made before. The impact showed that the cometary nucleus was very weak at scales fr

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