This volume presents papers concerning astronomy education and research in developing countries presented at a special session at the IAU 26th General Assembly in Prague. It gives a picture of the present state of astronomy in five major developing regions of the world: Latin America, Africa, Central Asia, the Far East and Eastern Europe. The book covers education and research, and also public outreach. New astronomy projects in developing countries are described, and initiatives to promote astronomy and space science from the UN and organizations other than the IAU are also covered. It finishes with a discussion of the future role of virtual observatories in developing countries and the concept of a Third World Astronomy Institute. This volume will be useful resource and reference for astronomers interested in promoting and supporting astronomy and space science around the world.

The IAU Centenary Symposium was held at its General Assembly in Vienna in 2018. It starts with plenary lectures, by Malcolm Longair on 100 years of astronomy, astrophysics and cosmology, and by Catherine Cesarsky, who reflects on a century of IAU history. There follows reminiscences from past IAU presidents and general secretaries and presentations on various aspects of IAU history, including some of the famous astronomers who served the Union. The volume then examines the relations between the IAU and different geographical regions, including the issues relating to the Central Powers after World War I, and the 'China crisis', when China withdrew from the Union in 1960 and was absent for two decades. The IAU's internal structures and organization are reviewed, along with trends in astronomical publishing and astronomical education. IAU S349 finishes with a vision of the IAU's future from its current president, Ewine van Dishoeck.

Astronomical spectrographs analyze light emitted by the Sun, stars, galaxies and other objects in the Universe, and have been used in astronomy since the early nineteenth century. This book provides a comprehensive account of spectrographs from an historical perspective, from their theory and development over the last two hundred years, to the recent advances of the early twenty-first century. The author combines the theoretical principles behind astronomical spectrograph design with their historical development. Spectrographs of all types are considered, with prism, grating or prism dispersing elements. Included are Cassegrain, coude, prime focus, echelle, fibre-fed, ultraviolet, nebular, objective prism, multi-object instruments and those which are ground-based, on rockets and balloons or in space. The book contains several tables listing the most significant instruments, around 900 references, and over 150 images, making it an indispensable reference for professional astronomers, graduate students, advanced amateur astronomers, and historians of science.