LIRA, a pioneer in astrophysics and instrumentation, pushes back the frontiers of knowledge
LIRA
Laboratory for Instrumentation and Research in Astrophysics
Meudon: a place to observe the sky, a haven for wildlife
8 June 2026The Paris Observatory’s Meudon campus, covering nearly 70 hectares, is home to a variety of habitats: naturally evolving woodland, undergrowth, meadows, wetlands… inhabited by numerous species of varying degrees of wildness and/or protected status, including around 400 Homo sapiens during the day, 286 of whom are LIRA staff.
This haven of biodiversity on the city’s doorstep is in itself a fascinating subject of research. Protected by the great enclosure wall built under Louis XVI, this estate, from which the sky has been observed for 150 years, has also become, almost in spite of itself, a refuge for wildlife.
Séminaires du pôle Systèmes Exoplanétaires Counting the worlds: an multi-technique approach to exoplanetary demographics
Séminaires du pôle Étoiles et Galaxies The nucleosynthesis of stars: a link between stellar modelling and galactic archaeology
Séminaires du pôle Étoiles et Galaxies The Omega Dwarf: Chemical Stratigraphy of the Disrupted Dwarf Galaxy That Left Behind Omega Centauri
News
SKAO: the French astrophysics community gathers at the Paris Observatory-PSL
Elsa Huby, winner of the 2026 Charles Defforey Foundation–Institut de France Grand Prize for Science
The Milky Way was shaped by a galactic collision that occurred earlier than expected
Presentation
LIRA, a CNRS joint research unit at Paris Observatory, is a laboratory of excellence in astrophysics and instrumentation. It studies astrophysical objects, from the Solar System to our Galaxy and beyond, through five thematic areas. Through international collaboration and instrumental innovation, it pushes back the frontiers of science and contributes to the training and dissemination of knowledge.
Our projects
MIRS on the JAXA MMX mission
The Martian Moons eXploration (MMX) mission of JAXA (Japan Aerospace Exploration Agency) is the first sample-return mission from the Phobos satellite. It also includes an exploration of the Martian system. The mission’s primary objective is to decipher the origin of Martian moons, which will provide important information on planet formation and the conditions for the emergence of water on Earth-like planets.
The MIRS (MMX InfraRed Spectrometer) instrument, developed under the leadership of LESIA (now LIRA), is an imaging spectrometer that will characterize the composition of the Martian system and help select candidate sites for sample collection.
GRAVITY+
The GRAVITY instrument, installed on the European Southern Observatory’s Very Large Telescope Interferometer (VLTI/ESO), has produced spectacular and transformative results on the supermassive black hole at the centre of the Milky Way, the active nuclei of other galaxies, proto-planetary disks around young stars and exoplanets. GRAVITY+ aims to modernise both VLTI and GRAVITY to make them ≈ 100 times more sensitive, while increasing sky coverage by a factor of ≈ 100, and contrast in the vicinity of bright objects by a factor of ≈ 10. These gains will benefit all the VLTI’s current and future instruments for the next 20 years, and will perpetuate it as a unique infrastructure in the world.
All projects
Projets en développement
Projets en exploitation
Projets passés
Contacts
Contacts
Postal address
Observatoire de Paris
5, place Jules Janssen
92195 Meudon
Phone
01 45 07 77 01
Meudon site
LIRA
Observatoire de Paris
5, place Jules Janssen
92195 MEUDON Cedex
Paris site
LIRA
Observatoire de Paris
77, Avenue Denfert-Rochereau
75014 Paris
Cergy site
LIRA - Site de Neuville II
UFR Sciences et Techniques - Département de physique
5, mail Gay Lussac
95000 Neuville-sur-Oise