InSight mission: Mars unveils its inner structures

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Based on a dozen earthquakes detected on Mars by the SEIS very broadband seismometer, developed in France, the international team of NASA’s InSight mission reveals the internal structure of Mars. The three studies published July 23 in Science, involving many co-authors from French institutions and laboratories, including CNRS, the Institut de Physique du Globe de Paris, Université de Paris, and supported by CNES and ANR, reveal, for the first time and thanks to the analysis of seismic waves, reflected and modified by these internal interfaces, an estimate of the size of the core, the thickness of the crust and the mantle structure. This is the first exploration by seismology of the internal structure of a telluric planet other than the Earth and an important step to understand the formation and thermal evolution of Mars.

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