International workshop "Europa lander: science goals and experiments" Space Research Institute (IKI), Moscow, Russia 9-13 February 2009 Near-Surface Atmosphere of Europa V.I. Shematovich Institute of Astronomy RAS, 48 Pyatnitskaya str., ... Near-surface atmosphere of Europa: O2 kinetic energy distributions ­ Model C Surface source of O2: surface sputtering by high-energy magnetospheric ions (blue line). ... Near-surface atmosphere of Europa: ionization chemistry in the H2O+H2+O2-dominant atmosphere ...

... The dayside auroral precipitation consist of magnetosheath related boundary layer precipitation, and plasma sheet related BPS/CPS precipitation (extensions of the nightside precipitation regions). ... For example, the much lower fluxes from the LLBL region when compared to the cusp are compensated by the bidirectional electron beams found in the LLBL: the precipitating energy fluxes in the LLBL and the cusp are not that different. ... directly through the cusp and plasma mantle . ...

Hubble Observations Shed New Light on Jupiter Collision . Was it a comet or an asteroid? ... Their initial findings, combined with results from other space-borne and ground-based telescopes, shed new light on Jupiter's atmospheric winds, its immense magnetic field, the mysterious dark debris from the impacts, and the composition of the doomed comet itself. ... Hubble's ultraviolet observations show the motion of very fine impact debris particles now suspended high in Jupiter's atmosphere. ...