I Inaugural Ceremony. - Address by Dr. A. Davidsen co-Chairman of the Local Organizing Committee. - Address by Dr. R. Giacconi co-Chairman of the Local Organizing Committee. - Address by Dr. F. Drake Chairman of the National Organizing Committee. - Address by Dr. S. Muller President of the Johns Hopkins University. - Address by K. L. Schmoke Mayor of the City of Baltimore. - Address by M. A. Steinberg Lieutenant Governor of the State of Maryland. - Address by Dr. F. Drake on behalf of Dr. B. Shakhashiri Assistant Director for Science & Engineering Education National Science Foundation. - Address by Dr. N. W. Hinners Associate Deputy Administrator NASA Headquarters. - Address by Dr. W. R. Graham Science Advisor to the President & Director of the Office of Science & Technology Policy. - Address by Prof. J. Sahade President of the International Astronomical Union. - II Extraordinary General Assembly. - 1. Extension of the membership of the Executive Committee by a President-Elect. - 2. Establishment of a new category of adherence to the Union Associate National Member. - III Twentieth General Assembly. - Session 1: 2 August 1988. - Session 2: 11 August 1988. - IV Report of the Executive Committee. - Executive Committee 19851988. - 1. Introduction. - 2. Administration. - 3. Commissions of the IAU. - 4. Scientific Meetings. - 5. Publications. - 6. Relations to other organisations. - 7. Financial matters. - 8. List of Adhering Organisations. - 9. List of deceased Members. - 10. List of IAU Publications. - V Report of Meetings of Commissions. - 4 Ephemerides (Ephémérides). - 5 Documentation & Astronomical Data (Documentation & données astronomiques). - 6 Astronomical Telegrams (Télégrammes astronomiques). - 7 Celestial Mechanics (Mécanique céleste). - 8 Positional Astronomy (Astronomiede position). - 9 Instruments & Techniques. - 10 Solar Activity (Activité solaire). - 12 Radiation & Structure of the Solar Atmosphere (Radiation & structure de l'atmosphère solaire). - 14 Atomic & Molecular Data (Données atomiques & moléculaires). - 15 Physical Study of Comets Minor Planets & Meteorites (Etude physique des comètes des petites planètes & des météorites). - 16 Physical Study of Planets & Satellites (Etude physique des planètes & des satellites). - 19 Rotation of the Earth (Rotation de la Terre). - 20 Positions & Motions of Minor Planets Comets & Satellites (Postitions & mouvements des petites planètes des comètes & des satellites). - 21 Light of the Night Sky(Lumière du ciel nocturne). - 22 Meteors & Interplanetary Dust (Météores & poussière interplanétaire). - 24 Photographie Astrometry (Astrométrie photographique). - 25 Stellar Photometry & Polarimetry (Photométrie & polarimétrie stellaire). - 26 Double & Multiple Stars (Etoiles doubles & multiples). - 27 Variable Stars (Etoiles variables). - 28 Galaxies. - 29 Stellar Spectra (Spectres stellaires). - 30 Radial Velocities (Vitesses radiales). - 31 Time (L'heure). - 33 Structure & Dynamics of the Galactic System (Structure & dynamique du système galactique). - 34 Interstellar Matter (Matière interstellaire). - 35 Stellar Constitution (Constitution des étoiles). - 36 Theory of Stellar Atmospheres (Théorie des atmosphères stellaires). - 37 Star Clusters & Associations (Amas stellaires & associations). - 38 Exchange of Astronomers (Echange d'astronomes). - 40 Radio Astronomy Radioastronomie. - 41 History of Astronomy (Histoire de l'astronomie). - 42 Close Binary Stars (Etoiles doubles serrées). - 44 Astronomy from Space (L'astronomie à partir de l'espace). - 45 Stellar Classification(Classification stellaire). - 46 Teaching of Astronomy (Enseignement de l'Astronomie). - 47 Cosmology (Cosmologie). - 48 High Energy Astrophysics (Astrophysique des hautes énergies). - 49 The Interplanetary Plasma & the Heliosphere (Plasma interplanétaire & héliosphère). - 50 Protection of Existing & Potential Observatory Sites (Protection des sites d'observatoires existants & potentiels). - 51 Bioastronomy: Search for Extraterrestrial Life (Bioastromie: recherche de la vie dans l'Univers). - VI Functions and Statutes of the Union Pink/FSl. - 1. Useful addresses. - 2. History of the Union. - 3. IAU Representation to other Organisations. - 4. Services of the Union. - 5. Rules for Scientific Meetings. - 6. Statutes By-Laws & Workings Rules. - VII Membership Green/Ml. - 1. List of Adhering Countries. - 2. Membership of Commissions. - 3. Geographical Repartition of Members. - 4. Alphabetical List of Members. - VIII IAU Style Book S1-S50. Language: English