Quakes rumbling through Mars have been detected rolling through its gooey core for the first time, giving scientists the tools they need to figure out what, exactly, Mars' heart is made of.
on the opposite side of the planet: a giant marsquake bigger than anything the lander had detected, and a meteorite impact that rattled Mars. Because these events were on the far side of the planet from InSight, the lander could analyze different waves – those that traveled around Mars, and those that traveled through it, giving us the first seismic waves that we know moved through the Martian core.
This means that the core is less dense and more compressible than Earth's core, which could help scientists better understand the differences between the two planets.
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