The observatories of the sciences of the Universe (OSU)
- EcceTerra (in French)
- EOST; School and Observatory for Earth Sciences, Strasbourg
- IAP; Paris Institute of Astrophysics
- IMCCE; Institute for Celestial Mechanics and Computation of Ephemerides
- IPGP; Paris Institute of Earth Physics
- Institut Pythéas (in French)
- IUEM; European Institute for Marine Studies
- OASU; Observatoire aquitain des sciences de l'Univers (in French)
- OAS; Observatory of Strasbourg
- OCA; Côte d'Azur Observatory
- Lyon Observatory (in French)
- Paris Observatory
- OPGC, Globe Physics Observatory of Clermont-Ferrand (in French)
- OREME, Mediterranean Research Observatory for the Environment (in French)
- OVSQ; Versailles Saint-Quentin-en-Yvelines Observatory (in French)
- OSUG; Grenoble Observatory for Sciences of the Universe
- OSUPS; Observatory of the Sciences of the Universe of University Paris-South
- OSUR; Earth Sciences and Astronomy Observatory: Rennes
- OSUC, Observatory of the Sciences of the Universe of the Centre of France (in French)
- OSUNA; Observatory of Earth and Planetary Sciences, University of Nantes (in French)
- OMP, Observatory Midi-Pyrénées
- OOB, Banyuls-sur-Mer Oceanographic Observatory
- IMEV; Institute of the sea of Villefranche (in French)
- OTELo; Earth and Environment Observatory of Lorraine (in French)
- OSU-EFLUVE (in French)
- OSU-Réunion (in French)
- THETA