NASA probe determines the internal structure of Mars

Jonathan Correspondent AMOSSCience @ BBCaman Twitter Published 1 day AgoshaReclosHare Pageecopy Linkabout SharingImage CopyrightNase / JPL-Caltechimage CaptionInsight The instrumentation has detected more than 700 seismic events since the beginning of 2019

scientists say that now have some absolute numbers to describe the internal rock structure of Mars.

The data comes from the Insight Spaceship, which has been detecting earthquakes on the planet since the beginning of 2019.

NASA LED mission reveals that the average thickness of the Mars cortex is between 24 km and 72 km, something thinner than expected.

But key finding is the size of the ET core. Its radius of 1,830 km is at the top end of the previous estimates.

This is the first time that science has managed to directly assign the internal layers of a planet apart from the earth. It has also been done for the moon, but Mars (Total Radio: 3,390 km) is on a much larger scale.

Having this information allows researchers to better understand the training and evolution of different planetary bodies.

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    Insight achieved its results in the same way that seismologists study internal stratification on Earth: monitoring of earthquakes signals.

    These events release energy waves. The changes in the road and the speed of the waves will betray the nature of the rocky materials through which they are going.

    The system of the seismometer deployed by NASA's probe has observed hundreds of tremors, with a handful in the last two years, having only the correct properties for " Image "Interior 'Mars'.

    The instrument team, which is LED of France and the United Kingdom, determines the rigid exterior, or the cortex, from Mars, 20 km or 39 Km of thickness directly below the probe (depending on the precise subank that exists). Extrapolating the geology of the well-known area of ​​the rest of the planet, this suggests an average thickness of between 24 km and 72 km. On the contrary, the thickness of the average cortex of the Earth is 15-20 km. Only in a continental region such as the Himalayas, can reach 70km.

    The really interesting number, however, is for the nucleus. The signs of "Marsqukees" bounced into this metal characteristic indicate that it begins almost half the surface, at a depth of approximately 1.560 km, and which is in a liquid state. Most previous estimates required a smaller core. image CopyrightNase / JPL-Caltech / Lockheed Martinimage Caption was launched at Mars in 2018, landing in November of that year

    the mission team says two fascinating consequences They flow from new direct observations.

    The first is that the Mass and the moment of inertia known for Mars involve the will of the nucleus. It is much less dense than previously thought, and that the iron-nickel alloy that dominates its composition should be strongly enriched in lighter elements, such as sulfur.

    The second the consequence is related to the layer between the core and the cortex, the mantle. This is now thinner than it was previously assumed and seems to be a simple rock layer with

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