15. The Combination of Theory, Observations and Simulation for the Dynamics of Stars and Star Clusters in the Galaxy. 16. Spectroscopy with Large Telescopes on Chemically Peculiar Stars. 17. History of Oriental Astronomy. 18. High Energy Transients. 19. Physics of the Sun and Heliosphere in the Era of Space Probes: Scientific Highlights of SOHO, Ulysses and YOHKO. 20. Enhancing Astronomical Research and Education in the Developing Countries. 21. The Megamaser - AGN Connection. 22. Astronomy from the Moon. 23. The Leonid Meteor Storms: Historical Significance and Upcoming Opportunities. 24. Pulsating Stars - Recent Developments in Theory and Observation. III: Special Scientific Sessions. SPS I: The Galileo Mission to the Jupiter System. SPS II: Highlights of the ISO Mission. SPS III: Comet Hale-Bopp. Author Index.

Since 1967, the main scientific events of the General Assemblies of the International Astronomical Union have been published in the separate series, Highlights of Astronomy. The present Volume 11 presents the major scientific presentations made at the XXIIIrd General Assembly, August 18-30, 1997, in Kyoto, Japan. The two volumes (11A+B) contain the texts of the three Invited Discourses as well as the proceedings or extended summaries of the 21 Joint Discussions and two Special Sessions held during the General Assembly.