Person Bullialdus; Ismael (1605 - 1694); astronomer and mathematician Bullialdus Ismael astronomer and mathematician Boulliau 1605 - 1694 French Male Loudun, France, Europe 28 September 1605 16050928 Abbaye St-Victor, Paris, France, Europe 25 November 1694 16941125

Clergyman, Roman Catholic; Diplomat Mathematics Astronomy Education: Loudun; Poitiers; Paris Career: Travelled in Italy, Germany, Poland and to the Levant, as ambassador of King Casimir; converted to Roman Catholicism (1626); worked as a librarian with the brothers Dupuy at the Bibliothque du roi (1632-1662); secretary to the French ambassador of Holland (1662-1666); librarian at Collge de Laon (1666); published multiple works on astronomy Parents: Ismael Boulliau and Susanna Motet Bullialdus was considered one of the most noted astronomers of his generation and enjoyed lifelong friendships with Pierre Gassendi, Marin Mersenne, and maintained correspondence with Johannes Hevelius (FRS 1664), Henry Oldenburg (FRS 1663), and Christian Huygens (FRS 1663). He was heavily involved in the correspondence network 'Republic of Letters', many letters of which survive at the National Library in France. His most important work is considered to be 'Astronomia philolaica' (1645) on planetary systems. Although he enjoyed a good reputation as an astronomer, his theories, including one of a new cosmology which went against Kepler's theories, were critiqued by some fellow astronomers. Fellow 04/04/1667 66 Henry Oldenburg Acted as an occasional correspondent, in particular on astronomical observations and tables (1670s) Sources: Bulloch's Roll; DSB; Biographie Universelle; Hunter; Biographical Encyclopedia of Astronomers References: Da Costa Andrade, E N. 1963. 'Samuel Pepys and the Royal Society', in Notes and Records, vol. 18, pp. 82-93 Bouillaud I, IM006226.jpg ©The Royal Society International Standard Archival Authority Record for Corporate Bodies, Persons and Families - ISAAR(CPF) - Ottawa 1996 ISBN 0-9696035-3-3 National Council on Archives, Rules for the Construction of Personal, Place and Corporate Names, 1997 RCN: 30853 RCN: 31934 RCN: R64842 RCN: 30854 RCN: 30855 RCN: 30856 RCN: 30857 RCN: 30858 https://pictures.royalsociety.org/results?mi_search_type=adv&mi_adv_search=yes&adv_person_id=AUTH1330 https://pictures.royalsociety.org/image-rs-17184 28 Sep 1605 - 25 Nov 1694 The past Fellows entries are under continuous revision. If you have queries or additional information to contribute, please contact Library@royalsociety.org. Content in external sources is not controlled by the Royal Society and historical sources may include content that is now unacceptable. Reviewed on 30/05/2022 as part of the Name Authority Project update. NA5773 21/11/2001 Andyg pmab 28/03/2023 RS_NET\JonathanB Yes http://viaf.org/viaf/29630623 5a6f1cf5-0830-48cd-8e37-53cb91707d03