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Physical risks of landing on a cometary nucleus

Kührt, E.; Keller, H. U.; Knollenberg, J.

Comets originate from the outer solar system where the density and temperature of the planetary nebula were rather low. They form a distinct class of small solar system bodies and their physical properties differ considerably from those of any other known objects. The present knowledge of the cometary nucleus is cursory and driven more by imaginat…

Observation of interplanetary particles in a corotating interaction region and of energetic water group ions from comet Grigg-Skjellerup

Coates, A. J.; Neubauer, F. M.; Daly, P. W. +2 more

During the flyby of the Giotto S/C with comet Grigg-Skjellerup (G-S) (9-11 July 1992) energetic particles ( E_{H 2O > 60 keV, Ep > 30 keV, Eα > 3.5 MeV), magnetic fields and plasma ions were measured by three different detectors on board Giotto. The flyby period was characterized by high magnetic field …}