Observatoire de Paris - PSL is a public institution responsible for fundamental and applied research, higher education and the sharing of knowledge in disciplines related to the sciences of the Universe, astronomy and time metrology.
Exploring and understanding the Universe. Teaching and training. Sharing knowledge.
Exhibitions and information
Du Friday 7 November 2025
à partir de
10H00 au
Sunday
9 November 2025 jusqu'à
20H00
L’Observatoire de Paris – PSL à Explor’Espace : trois jours pour partager ensemble la passion du ciel et des sciences
Public talks
Wednesday 12 November 2025
de
16:00 à
17:00
Le problème de la masse manquante dans l’Univers
Public talks
Thursday 13 November 2025
à
19h00
Les instruments de Meudon : de la Grande Lunette aux géants du XXIe siècle Miguel Montargès
About Paris-PSL Observatory
Founded in 1667, the Observatoire de Paris has been a center of innovation and discovery in astronomy for over 350 years. With 750 researchers and teacher-researchers, engineers, technicians and administrative staff, the establishment conducts research on its 3 campuses in astrophysics, physics, engineering and the metrology of time and space. Its work combines theory, numerics, experimentation, ground-based and space-based observations, and instrumental development.
Paris Observatory produces French legal time, ephemerides of the Sun, Moon and solar system bodies, and operates state-of-the-art radio telescopes at Nançay. It offers academic training (Masters, PhD), training for the general public and teachers, and class sponsorship. It is a founding member of the Université Paris Sciences et Lettres.
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Creation
1667
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Campus
Paris, Meudon, Nançay (France)
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Trainings
6 degree
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Research
6 research and/or support units
News
Administrative news
31 October 2025
Two scientists from the Paris Observatory - PSL honored at the 2025 Academy of Sciences awards ceremony
Exhibitions and information
30 October 2025
The Paris Observatory – PSL at Explor’Espace: three days to share our passion for the sky and science
News from the labs
28 October 2025
Radio bursts reveal small-scale magnetic arches on the star AD Leonis
Administrative news
Rodolphe Le Targat receives the Del Duca 2025 grant
In 2025, the Simone and Cino Del Duca Foundation awarded the “Sciences of the Universe and their Applications” grant to Rodolphe Le Targat of the Laboratoire...
Highlights
Anniversary: 10 years since the first detection of a gravitational wave
A few tenths of a second, ten years ago, were enough to open up a new field of astronomy: gravitational waves. The Paris Observatory - PSL has played its...
Highlights
An occultation by Ganymede on October 14, 2025
A rare event will take place on the night of October 13 to 14, 2025: Ganymede, Jupiter’s third moon, will occult a star of magnitude 7. The phenomenon will...
Highlights
Gamma-ray astronomy: construction begins on 12 telescopes for the CTAO
The Paris-PSL Observatory and the CNRS have enabled the international Cherenkov Telescope Array Observatory (CTAO) project to reach a key milestone with the...
Exhibitions and information
Observatoire de Paris - PSL participates in Fête de la science 2025
Observatoire de Paris - PSL is participating in Fête de la science by opening its Meudon site to the public on Saturday, October 11, 2025. Choose from a...
Research
Observatoire de Paris-PSL is a unique research establishment, in terms of its history, reputation and diversity of research fields, as well as its ability to initiate innovative, multidisciplinary research.
The establishment is home to around a quarter of France’s total workforce in astronomy and astrophysics. The diversity of profiles and research themes creates an ecosystem that is unique in France, enabling the development of excellence in both fundamental and applied research, in emblematic fields and at the crossroads of disciplines.
Library
The Collection d’Excellence in Astronomy and Astrophysics, associated with the Bibliothèque Nationale de France, is one of the finest astronomy-physics libraries in the world, and a service entirely dedicated to research.
Joint services
A team dedicated to enhancing the attractiveness of the Paris Observatory and supporting research, teaching and the dissemination of knowledge.
Under the authority of the President, the General Services Manager steers and coordinates these services to ensure, in liaison with the establishment’s scientific departments and services, efficient management of resources and projects, while fostering an environment conducive to staff development.