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Gas release from ice/dust mixtures

Krankowsky, D.; Mauersberger, K.; Hesselbarth, P. +4 more

Gas fluxes from insolated ice/dust mixtures were measured by pressure gauges and a mass spectrometer placed one meter in front of the sample. As soon as the insolation of about one solar constant was started a fast rise in H₂O and CO₂ emissions from the fresh surface was observed. Thereafter gas fluxes slowly decreased. When …

Giotto's Mission to planet Earth

Glassmeier, K. -H.; Neubauer, F. M.; Ungstrup, E. +9 more

After its successful encounter with comet P/Halley and a four-years hibernation period ESA's Giotto spacecraft has been reactivated in February 1990 and performed the first-ever Earth gravity-assisted maneuver on July 2, 1990 to be retargeted for comet P/Grigg-Skjellerup. This swing-by is of unique scientific interest due to Giotto's hyperbolic, h…