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Even the casual reader cannot fail to notice the somewhat uneven presentation of the contributions contributians to this volume, in particular what concerns the st style. yle. A closer scrutiny will also reveal that whereas the English language is certainly the preferred vehicle for commu nication in astronomy, it is not the mother tongue of all contributors. However, while editing this volume I have felt that it would be more important to assure a speedy publication than to attempt to achieve a high degree of uniformity, which would anyhow be extremely diffi cult with more than 100 eontributing contributing authors. When published, this book should stiIl still be a tool for aetive active research, not a museum pieee. piece. I am grateful to the organizers and editors of the individual sections seetions for having produced produeed their parts with within in the allotted time, and with a high degree of professionalism. A special speeial word of thanks goes to my eollaborators collaborators at the European Southern Observatory, Mrs. E. Volk, Völk, Mr. Nr. C. Madsen, and Mr. J. _Leelereqz, _Leclercqz, for technical teehnieal assistanee. assistance.
List of contents
Invited Discourses.- Astronomy in Ancient Greece.- The Origin and Early History of the Sun and the Planetary System in the Context of Stellar Evolution.- Modern Cosmology.- Original and Development of Solar Flares.- Joint Discussions.- 1. Solar Luminosity Variations (Chairaman: J.A. Eddy).- 2. Evolution in Old Stellar Populations in Galaxies (Chairaman: G. Lyngå).- 3. The Extragalactic Distance Scale and the Hubble Constant (Chairaman: P.W. Hodge).- 5. Origin and Evolution of Interplanetary Objects (Chairaman: B.A. Lindblad).- 6. Active Galactic Nuclei (Chairaman: F. Pacini).- 7. Mass Loss Phenomena (Chairaman: A.G. Hearn).- Joint Commission Meetings.- 1. Giant H II Complexes Outside Our Galaxy (Chairaman: J. Heidmann).- 2. UV and X-Ray Observations of Interacting Binary Systems (Chairaman: Y. Kondo).- 3. The Violent Interstellar Medium (Chairaman: V. Radhakrishnan).- 4. Coma Models (Chairaman: B.D. Donn).- 5. Beams and Jets in Extragalactic Sources (Chairaman: R.D. Ekers).- 6. The Local Supercluster and its Environment (Chairamen: G.O. Abell and B.E. Westerlund).- 7. Atomic and Molecular Data (Chairamen: W. Bonsack, J.G. Phillips and G. Traving).- Author Index.
