Journees 2023: Time and General Relativity

Observatoire de la Côte d'Azur together with Observatoire de Paris are pleased to announce that the "Journées 2023: Temps et Relativité Générale (Time and General Relativity)" will be held from 11 to 13 September 2023  in Nice  at Université Côte d'Azur and Observatoire de la Côte d'Azur.

This colloquium is in the direct continuation of the recurrent Journées which have been organized with success during more than three decades, of which the main purpose is to provide a forum for advanced discussions in the fields of space-time reference systems, Earth rotation, solar system dynamics and ephemerides and space navigation.

In the interest of enhancing our understanding of astronomical and atomic time, as well as their interconnections, these Journées 2023 are devoted to geophysical, astronomical, and physical aspects of time, its measurements and interpretations. The meeting will try to cover theoretical concepts, in particular the relativistic framework, as well as observational and technical solutions of time systems.

The topics of interest include, but are not limited to:

1. Physics of  time and underlying philosophical concepts ;

2. Tests of gravity in the solar system;

3. Latest progresses in time measurement, development of frequency standards;

4. Application of ultra-accurate time reference scale in physics and astronomy (time transfer, gravitational waves observations, ...) ;

5. Last advances in the determination and prediction of Earth Rotation changes and realisation of space reference systems ;

6. Geophysical interpretation of UT1 and LOD variations, consequences on Earth rheology;

7. Time and Solar system dynamics: equator and equinox;

The question of the definition of lunar time and reference system will also be addressed.

These Journées 2023 are sponsored by Observatoire de la Côte d'Azur, Université Côte d'Azur, CNRS, Paris observatory.


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