Reports on Astronomy: Commission Legacy Reports (IAU XXIXA)
IAU Transactions XXIXA
Proceedings of the International Astronomical Union Symposia and Colloquia Series

IAU Transactions XXIXA reports on the IAU Commissions that were created at the very first IAU General Assembly in Rome in 1922, and were terminated by the Executive Committee during the XXIX General Assembly in Honolulu in 2015. It includes the final Business Meetings of these 'old' Commissions and Working Groups (which historically appeared in the Transactions of the IAU 'B' volumes). In addition to these transactions, many of the Commission Presidents have enhanced their contributions with historical perspectives on their Commissions, going back in time a couple of triennia, sometimes longer. This volume, subtitled Commission Legacy Reports, is therefore unique in the organisation's history. It signals the end of an era, and the beginning of another, looking ahead to the organisation's 100th anniversary in 2019, whose celebrations will begin at the XXX General Assembly in Vienna in 2018.

Preface; Part I – Division A: Fundamental Astronomy: Commission 4: Ephemerides; Commission 4 Working Group on Standardizing Access to Ephemerides and File Format Specification; Commission 7: Celestial Mechanics; Commission 8: Astrometry; Commission 19: Rotation of the Earth; Commission 31: Time; Part II – Division B: Facilities, Technologies and Data Science: Commission 5: Documentation; Commission 6: Astronomical Telegrams; Commission 14: Atomic and Molecular Data; Commission 14 Working Group on Atomic Data; Commission 14 Working Group on Collision Processes; Commission 14 Working Group on Molecular Data; Commission 14 Working Group on Solids and Their Surfaces; Commission 25: Photometry and Polarimetry; Commission 40: Radio Astronomy; Commission 50: Protection of Existing and Potential Observatory Sites; Part III – Division C: Education, Outreach, and Heritage; Commission 41: History of Astronomy; Commission 46: Education and Development; Commission 55: Communicating Astronomy with the Public; Part IV – Division D: High-Energy Phenomena and Fundamental Physics: Commission 44: Space and High-Energy Astrophysics; Part V – Division E: Sun and Heliosphere: Commission C10: Solar Activity; Commission C12: Solar Radiation and Structure; Commission C49: Interplanetary Plasma; Part VI – Division F: Planetary Systems: Commission C15: Physical Study of Comets and Minor Planets; Commission C20: Positions and Motions of Minor Planets, Comets and Satellites; Commission 22: Meteors, Meteorites and Interplanetary Dust; Commission 51: Bio-Astronomy; Commission 53: Extrasolar Planets; Part VII – Division G: Stars and Stellar Physics: Commission 26: Double and Multiple Stars; Commission 27: Variable Stars; Commission 29: Stellar Spectra; Commission 35: Stellar Constitution; Commission 36: Stellar Atmospheres; Commission 42: Close Binary Stars; Commission 45: Stellar Classification; Part VIII – Division H: Insterstellar Medium and Local Universe; Commission 33: Galactic System; Commission 34: Interstellar Medium; Commission 37: Star Clusters and Associations; Part IX – Division J: Galaxies and Cosmology; Commission 21: Background Radiation; Commission 28: Galaxies; Part X – Executive Committee: Working Group: Women in Astronomy; Working Group: Public Naming of Planets and Planetary Satellites; Working Group: Cosmic Light (2015 International Year of Light).