Means big, the heart of Mars has been revealed

The main objective of the mission has been achieved”, said Philippe Legnona, geophysicist at the Institute for Physics at the World in Paris (IPGP) and scientific director of the Mars Seismometer. more (Seismic experiments for indoor facilities), during a press conference on 21 July 2021 at IPGP. Launched and stored on Mars in December 2018 by NASA InSightInland exploration using seismic investigations, geodesy and thermal transport), a seismometer manufactured by Philippe Legnonier reveals, for the first time, the internal structure of the red planet. The thickness and division of the crust in particular, but also the structure of the mantle, the heat flux out of the planet’s core and the size of the core, the results of two years of detailed measurements and analyzes in several publications from the journal Science July 23, 2021. So, among these crops, “This is the size of the heart of Mars – much bigger than expected! – This is the biggest surprisePhilippe Legnonier points out.

Ultrasound usus Mars

Little is known, so far, about the bowels of Mars. Estimates of the core radius are between 1,600 and 1,900 kilometers, which is a very wide range. Planetary scientists have speculated about its composition and wondered if it was still liquid and whether it was made, like Earth, from a solid seed surrounded by a liquid envelope. Analysis of seismic waves recorded during a Martian year (that is, about two Earth years) has answered most of these questions.


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