Lecture by Michel Blanc, astronomer at IRAP, Midi-Pyrénées Observatory, member of AAE, and Didier Foucault, professor emeritus of modern history, Université Jean Jaurès. 31 May 2016, at the José Cabanis Mediathèque, Toulouse
Lecture by Michel Blanc, astronomer at IRAP, Midi-Pyrénées Observatory, member of AAE, and Didier Foucault, professor emeritus of modern history, Université Jean Jaurès. 31 May 2016, at the José Cabanis Mediathèque, Toulouse