Ionospheric gas dynamics of satellites and diagnostic probes

The gas dynamics of interactions of a tenuous ionosphere with moving satellites and probes that have bearings on the diagnostics of the ionosphere are discussed. Emphasis is on the cases where the body is moving at mesothermal speeds, namely intermediate between the thermal speeds of ions and electrons of the ambient ionosphere. Methods of collision-free plasma kinetics with self-consistent field are used. The development of the topics for discussion starts with stationary Langmuir probe which entails the basic mechanism of body-plasma interaction that becomes further intricated as the body moves at a higher and higher speed. Applications of the theory of plasma interaction to meteors which move in the ionosphere are also presented.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/43801/1/11214_2004_Article_BF00212707.pd

"Ein „politisch schiefer Kopf" und der „letzte Mumienkasten" - Humboldt und Metternich"

Article in German, Abstracts in English.In this short essay, the Alexander von Humboldt scholar Kurt-R. Biermann (1919-2002) shed some light on the relationship between the famous conservative Austrian statesman Prince Metternich and the liberal Prussian scientist Alexander von Humboldt. It is one of the old legends that Humboldt and Metternich had studied together in Göttingen. They first met 1807 in Paris and corresponded in the most polite manner basically on one common field of interest, namely the promotion of the sciences