Titlebook: Reports on Astronomy; Patrick A. Wayman (General Secretary of the Union) Book 1982 Springer Science+Business Media Dordrecht 1982 astronom

使人煩燥

Light of the Night Sky (Lumiere du Ciel Nocturne),nterplanetary (zodiacal light), galactic integrated starlight, diffuse galactic light) and extragalactic (extragalactic background light). Thus the study of nature of each light source, covering large distance, is pursued in different fields of astronomy. However, the techniques of measurement for r

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寬容

植物茂盛

Stellar Photometry and Polarimetry,ightness of an object for measurement at the telescope. The field is in fact so broad that much of the current work is more appropriate to the reviews of other IAU Commissions and it has become accepted that Commission 25 deals mainly with those subjects which are of common practical interest to pho

Dignant

Variable Stars,rch to be reported on becomes ever larger. Thus while my predecessors have used this introductory section to detail the symposia and colloquia held over the past three years, as well as other administrative matters, I have decided to omit this material (which is available elsewhere) in favour of max

seduce

,Mécanique Céleste,f some of natural satellite motions have been developed by several authors. Many papers on artificial satellite motions from several aspects were still published and more precise expressions for relativistic effects were derived.

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大洪水

Solar Activity, our Commission, and avoiding double work. Only a limited space was made available for our Commission. Given this restraint we tried to produce a comprehensive review. With great pleasure I appreciate the excellent cooperation of the members of our Executive Committee in the preparation of this report.

Synovial-Fluid

新星

Documentation and Astronomical Data,of primary papers have indicated the need for new and more efficient coordinative guidelines. Several documents have been published and are under consideration, or are in preparation, for the agenda at the IAU General Assembly in 1982.