Often debated at the margins of a science then in the process of professionalization, the cosmic origins are a delicate subject, at the crossroads of astronomy and religion, of proof and speculation, of work and leisure. Through the study of these cosmogonists, most of whom have been forgotten, this book allows us to observe the way in which scientists and their institutions endeavored to regulate the desire to participate in the production of knowledge that pervaded society during the last decades of a bubbling cosmology, doomed to disappear with the radical epistemological break due to Albert Einstein, one of whose effects was to be properly sociological, namely a drastic reduction in the number of people likely to contribute.