Using several thousand images of Saturn's moons produced by the Cassini probe (NASA/ESA), an international team led by an astronomer from the Observatoire de Paris in the Institute of Celestial Mechanics and Calculation of Ephemerides ( Observatoire de Paris / CNRS / UPMC / Université Lille 1), in collaboration with CEA researchers, has succeeded in bringing to light small fluctuations in the gravitational field of the planet. These extremely fine results are the outcome of a series of works carried out by the same team on the Saturn ecosystem and should allow to better understand the internal structure of Saturn. These results are in press in the International Journal Icarus and are the subject of an video.
For more information : see the French version
Contact : Stéphane MATHIS
Publication :
« New constraints on Saturn's interior from Cassini astrometric data »
V. Lainey et al. (2017) in Icarus, Volume 281, 1 January 2017, pp. 286-296
for an electronic version : 
Laineyetal2016.pdf
For more information : see the ENCELADE team website
and the video : « Saturn, an ecosystem » (8 min 37s)
[1] ENCELADE Team. Established in 2007, the ENCELADE international scientific team carries out studies that have resulted in three successive publications in 2011, 2012 and 2016. The results of this work deeply renew the vision of the formation and evolution of the Saturn system. To illustrate this work, the team carried out an animation under the title "Saturn, an ecosystem", available on the dailymotion channel of the Observatoire de Paris. This video was supported by the Observatoire de Paris, the Pierre et Marie Curie University (UPMC), the UnivEarthS laboratory of excellence (Sorbonne University Paris Cité) and the L'Oréal Foundation "For Women and Science ".
