The International Astronomical Union (IAU) was founded in 1919, in the wake of the First World War, together with its sister Unions in related natural sciences. It will thus turn 100 years in 2019. Written by a mixed team of insiders and outsiders, this book presents the IAU in the changing context of the historical, scientific and technological development of astronomy during the past 100 years.
While much important scientific progress took place already before 1945, the book naturally focuses on the accelerating evolution during the second half of the century. In the past few decades, the previously narrow IAU focus on organising professional astronomy has broadened to include societally relevant activities such as addressing the hazard of asteroid impacts, the planetary status of Pluto in the Solar System, and the hugely successful International Year of Astronomy. Most recently, it is spearheading a combination of science literacy and public outreach.
The book will be of interest to professional astronomers as well as an astronomically interested general audience. The book features live personal interviews with as many of the key actors as still possible.

This book chronicles the International Astronomical Union on the background of 100 years of astronomy It describes how the Union has evolved from a closed club of astronomers to a vital force in modern society A central feature is its live personal interviews, with new photos, of many of the key actors since 1964

Autorentext
Johannes Andersen (Denmark) is a former IAU General Secretary and a research astronomer with ~400 professional publications and an IAU Symposium volume behind him.

David Baneke (Netherlands) is assistant professor in the history of science at Utrecht University and has written extensively on the history of modern science and scientific institutions.

Claus Madsen (Denmark) is a former outreach and policy officer at ESO, a key actor in the preparation of the IYA in 2009, and the author of books on astronomy, including the history of ESO, science communication and European science policy.

Inhalt
Chapter 1: The Birth of the IAU (1919-1929).- Chapter 2: Crises and Opportunities (1940-1959).- Chapter 3: A Decade of Astronomical Surprises (1960-1969).- Chapter 4: A Two-Faced Period (1970-1989).- Chapter 5: Opening up (1990-2000).- Chapter 6: The IAU in the 21st Century (2001-2019).- Appendix 1: General Assemblies, Membership Numbers, Officials.- Appendix 2: Commission History.- Appendix 3: List of National Members.- Appendix 4: International Schools for Young Astronomers.