The mass of the Milky Way is sharply revised downwards, calling cosmology into question

- FR- EN
 (Image: Pixabay CC0)
(Image: Pixabay CC0)
Thanks to the latest catalog from ESA’s Gaia satellite, an international team, led by astronomers from Observatoire de Paris - PSL and CNRS, obtains the most accurate measurement of the Milky Way’s mass. The subject of an article published in the journal Astronomy and Astrophysics on September 27, 2023, this study opens the way to important questions in cosmology, particularly on the relative amount of dark matter contained in our Galaxy.


Detection of the Keplerian decline in the Milky Way rotation curve.
Yongjun Jiao et al. (2023). Astronomy & Astrophys , September 27, 2023.
DOI: 10.1051/0004-6361/202347513
Article also available at:

La fondation CNRS

To support and develop research at the highest level.