Publications of the International Astronomical Union (IAU), such as Proceedings of IAU Symposia and Colloquia, contain biographical notes and papers as well as obituaries. Of great value are also the death announcements in the IAU Information Bulletins that contain the only biographical data known for about 200 astronomers. The kind of data given in these announcements varied over time. References to these data can be found in the Biographical Index of Astronomy. Recently the printed announcements were replaced by entries in the on-line IAU membership database.
