le 2 décembre 2022, 11h à 13h, Guillaume Loizelet, salle Jules Verne, OMP, site Belin In this session, I will review the results obtained by historians of astronomy over the last fifty years, which have led to a complete rethinking of the idea of a scientific revolution developed in the mid-twentieth century.I will first look […]
le 25 novembre 2022, 11h à 13h, Guillaume Loizelet, salle Jules Verne, OMP, site Belin Using the available databases, it was possible for ancient « astronomers » to propose models to account for observable celestial movements. The climax of these attempts is undoubtedly the great mathematical synthesis (known as the Almagest) written in Greek by the Alexandrian […]
le 18 novembre 2022, 11h à 13h, Guillaume Loizelet, salle Jules Verne, OMP, site Belin It is not possible to develop a mathematical model without a reliable and consistent database.In this session, I will first detail the cultural context that led the Babylonian « astronomers » to establish formidable data collections in the form of clay tablets. […]
le 14 octobre 2022, 11h à 13h, Olivier Berné, salle Jules Verne, OMP, site Belin In this seminar, I will present the first scientific results that have been obtained from the JWST mission. After a general presentation of the mission and science results on various topics, I will describe the Early Release Science (ERS) project […]
le 21 octobre 2022, 11h à 13h, Nicolas Clerc, salle Jules Verne, OMP, site Belin Observations of galaxy clusters at X-ray wavelengths offer a unique window to understanding the physical processes governing the assembly of large-scale structure in our Universe and the cosmic web. X-rays signpost the hot and tenuous gas that permeates the entire […]
le 7 octobre 2022, 11h à 13h, Sébastien Guillot, salle Jules Verne, OMP, site Belin Neutron stars are the extremely dense compact remnants of supernova explosions. Despite over 50 years of observations of neutron stars at all wavelengths, the composition and properties of the matter inside their core remain unknown because such densities are not […]
le 16 septembre 2022 de 11h00 à 13h00, Sylvestre Maurice, salle Jules Verne, OMP, site Belin
le 23 septembre 2022, 11h à 13h, Katia Ferrière, salle Jules Verne, OMP, site Belin Magnetic fields are ubiquitous in the Universe. Most celestial bodies, from planets to stars to galaxies, appear to be magnetized. Even intergalactic space could be threaded by a magnetic field. Cosmic magnetic fields generally play an important role. They affect […]
le 30 septembre 2022, 11h à 13h, Natalie Webb, salle Jules Verne, OMP, site Belin Thanks to large surveys such as Gaia, the Sloan Digital Sky Survey (SDSS), GALEX, 2MASS, NVSS, FIRST, XMM-Newton and Chandra, we have catalogued many different stars and galaxies. We have also found some very exotic objects, especially when we observe […]