Titlebook: Astrometric Binaries; An International Con Zdeněk Kopal,Jürgen Rahe Book 1985 D. Reidel Publishing Company, Dordrecht, Holland 1985 astrome

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Weitere Arten geistigen Eigentumsstronomer F. W. Bessel. You have given me a welcome opportunity to express an appreciation of Bessel’s work which has marked the beginning of research on the motion of stars and which was pioneer work on astrometric binaries and on the determination of stellar distances. Bessel has established the f

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Forschen – Patentieren – Lizenzierennd multiple systems. Because of the Hipparcos observation technique, these systems have to be divided in a few particular categories that are described and discussed. Each of them leads to specific considerations concerning the contribution of the Hipparcos observations. The category of very close p

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Weitere Arten geistigen Eigentumsremarkable evolution has resulted now in the reversed situation with the painful question, at least for some of us: do single stars really exist?.It is recognized by everybody, that many essential properties of stars can only be obtained from observations of close and wide binaries..It is the aim of

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