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Published on 5 August 2025

A groundbreaking technical advance with unprecedented support from artificial intelligence

Phase B1 of MOSAIC marked a key milestone: the validation of the instrument’s system architecture, which is consistent and fully meets the scientific...
Published on 1 July 2025

The James Webb telescope discovers its first exoplanet

A team led by a CNRS researcher from Observatoire de Paris - PSL has just enabled the James Webb Space Telescope to make its first direct imaging discovery...
Published on 13 June 2025

Towards a new definition of the second thanks to a global network of atomic clocks

Published on June 12, 2025 in the journal Optica, an international study presents the simultaneous comparison of ten optical clocks in six countries, via...
Published on 21 May 2025

Thirty years of Franco-Ukrainian cooperation in radio astronomy recognized by the Ukrainian Academy of Sciences

For over three decades, teams at Observatoire de Paris-PSL have been working closely with the Kharkiv Institute of Radio Astronomy (IRA) in Ukraine. This...
Published on 15 May 2025

60 years of observing the cosmos: the Grand Radiotélescope de Nançay, a giant still at work

May 14, 2025 marks the 60th anniversary of the Grand Radiotélescope at the Observatoire Radioastronomique de Nançay (ORN). Inaugurated in 1965 by General de...
Published on 30 April 2025

PHARAO successfully launched

On Monday April 21, 2025, PHARAO (Projet d’Horloge Atomique par Refroidissement d’Atomes en Orbite - Atomic Clock by Cooling Atoms in Orbit) became the first...
Published on 8 April 2025

A new day on Uranus

Using the aurora of Uranus as a celestial clock, a team led by Paris Observatory - PSL has tackled a decades-old problem: redefining the rotation speed of...
Published on 20 March 2025

World Water Day... how about a look into space?

Every year, World Water Day reminds us how precious this resource is on our planet. But its story is not limited to Earth! Water also intrigues astronomers,...
Published on 20 February 2025

Researchers discover hidden treasures in MeerKAT’s archive of observations

An international team of researchers, including scientists from Observatoire de Paris - PSL, Rhodes University’s Centre for Radio Astronomy Techniques and...
Published on 3 February 2025

The mass of the Andromeda galaxy is revised downwards

Using the most sophisticated dynamical model of the Andromeda galaxy and of its past history, a team led by an astronomer from the LIRA at the Paris...