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Titlebook: Reports on Astronomy; Transactions of The Jean-Pierre Swings (General Secretary of the Union Book 1988 Springer Science+Business Media Dor

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Ephemerides, catalogues or maps of the heavens established for the epoch J2000.0. This is awkward for observers of comets and minor planets and, for that reason, Commission 20 decided, at the New Delhi meeting of IAU that there would be a gradual introduction of the J2000.0 system as far as those bodies are concerned.
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Stellar Photometry and Polarimetry,heir capability of delivering immediately recordable signals which can be processed by appropriate computational means, have been the cause of spectacular progress regarding the photometric precision of weak signal measurements.
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Double and Multiple Stars,emands upon double star astronomy that have been absent for half a century. Today double and multiple star astronomy is perhaps closer to fulfilling its true potential than it has ever been, entering a fundamentally important area of modern astrophysics.
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Arthur R. Upgren,William F. van Altena,A. N. Argue,T. E. Corbin,Ch. de Vegt,W. Gliese,I. I. Kanaev,T
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Jean-Pierre Swings (General Secretary of the Union
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