Reports on Astronomy: Transactions of the International Astronomical Union Volume XXIIIA [Paperback]

IAU Transactions are published as a volume corresponding to each General Assembly. Volume A is produced prior to the Assembly and contains Reports on Astronomy, prepared by each Commission President. The intention is to summarize the astronomical results that have affected the work of the Commission since the production of the previous Reports up to a time which is about one year prior to the General Assembly. Volume B is produced after the Assembly and contains accounts of Commission Meetings which were held, together with other material. The reports included in the present volume range from outline summaries to lengthy compilations and references. Most reports are in English.Individual Reports of Divions/Commissions & Working Groups.- Commissions of the Executive Committee.- 5 Documentation & astronomical Data.- 14 Atomic & molecular data.- 38 Exchange of astronomers.- 46 Teaching of astronomy.- 50 Protection of existing & potential observatory sites.- Working Groups of the Executive Committee.- WG Encouraging the International Development of Antarctic Astronomy.- WG Planetary system nomenclature.- WG World wide Development of Astronomy.- WG Future Large Scale Facilities.- Divisions.- I Fundamental Astrometry.- 4 Ephemerides.- 8 Positional astronomy.- 19 Rotation of the Earth.- 24 Photographic astrometry.- 31 Time.- II Sun & Heliosphere.- 10 Solar activity.- 12 Solar radiation & structure.- 49 The interplanetary plasma & the heliosphere.- III Planetary system sciences.- 15 Physical study of comets, minor planets & meteorites.- 16 Physical study of planets & satellites.- 20 Position & motions of minor planets, comets & satellites.- 21 Light of the night sky.- 22 Meteors & interplanetary dust.- 51 Bioastronomy: search for extraterrestrial life.- Inter-Commission WG on the prevention of interlanetary pollution.- IV Stars.- 26 Double & multipl�