Paléogéographie de l'Europe au Carbonifère

Paproth Eva. Paléogéographie de l'Europe au Carbonifère. In: Bulletin de la Classe des sciences, tome 17, n°7-12, 2006. pp. 197-206

LE TEMPS EN GÉOLOGIE

Am Beispiel des Referenschnitts des Fuszcarboniferum Alterbestimmung nach einer BezugsteinschichtSur l'exemple de la coupe de référence de base du Carbonifère. Datation par un niveau pétrographique d'un âge absol

Present data on the Devonian/Carboniferous Boundary in Western Europe

peer reviewe

The PLATO Mission

International audiencePLATO (PLAnetary Transits and Oscillations of stars) is ESA's M3 mission designed to detect and characterise extrasolar planets and perform asteroseismic monitoring of a large number of stars. PLATO will detect small planets (down to <2 R_(Earth)) around bright stars (<11 mag), including terrestrial planets in the habitable zone of solar-like stars. With the complement of radial velocity observations from the ground, planets will be characterised for their radius, mass, and age with high accuracy (5 %, 10 %, 10 % for an Earth-Sun combination respectively). PLATO will provide us with a large-scale catalogue of well-characterised small planets up to intermediate orbital periods, relevant for a meaningful comparison to planet formation theories and to better understand planet evolution. It will make possible comparative exoplanetology to place our Solar System planets in a broader context. In parallel, PLATO will study (host) stars using asteroseismology, allowing us to determine the stellar properties with high accuracy, substantially enhancing our knowledge of stellar structure and evolution. The payload instrument consists of 26 cameras with 12cm aperture each. For at least four years, the mission will perform high-precision photometric measurements. Here we review the science objectives, present PLATO's target samples and fields, provide an overview of expected core science performance as well as a description of the instrument and the mission profile at the beginning of the serial production of the flight cameras. PLATO is scheduled for a launch date end 2026. This overview therefore provides a summary of the mission to the community in preparation of the upcoming operational phases