Seismic Waves Help Map the Core of Mars for the First Time - by spacewriter
According to Nicholas Schmerr of the University of Maryland and a member of a team that used InSight data to study Mars, the differences between Earth and Mars cores hint at different formation stories for each planet. “You can think of it this way; the properties of a planet’s core can serve as a summary of how the planet formed and how it evolved dynamically over time.
Interestingly, despite having a liquid iron core, Mars doesn’t seem to have much of a global magnetic field. It probably did generate one in the past, however. Planetary scientists suspect that it existed because Mars’s rocks contain traces of magnetism from ancient times. That magnetic “memory” gets embedded in rock crystals as they cool in the presence of a magnetic field. That memory can last for millions or billions of years.
No one has been able to directly image the Martian core. However, planetary scientists have made extensive models of what they think conditions are like there. The InSight seismic measurements confirm the accuracy of those models.
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