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Aspects of the major element composition of Halley's dust
Kissel, J.; Jessberger, E. K.; Christoforidis, A.
The chemical composition of the solid grains from comet Halley can be inferred from impact-ionization time-of-flight mass spectrometry. Halley's dust in the vicinity of the VEGA-1 spacecraft is a mixture of a refractory organic component and unequilibrated silicates, but detailed chemical information on individual particles is difficult to extract…
Surficial textures of the Galilean satellites
Buratti, B. J.; Nelson, R. M.; Lane, A. L.
Knowledge of the textural characteristics of planetary surfaces is one of the objectives of remote sensing observations. The comparison of accurate photometric measurements with scattering models yields estimates of the compaction state of the optically active portion of the regoliths of airless bodies. We have analysed as a function of solar phas…
On the rotation axis of comet Halley
Keller, H. U.; Thomas, N.
The observations of comet Halley by the Halley Multicolour Camera (HMC) on board the European Space Agency's Giotto spacecraft were supported by an extensive ground-based observational programme using the same filter set1. The intention was to place the transitory but detailed observations of the encounter in the frame of ground-based o…
Happy birthday, IUE
Coles, Peter