Researchers have gained new insights into Mars' liquid core, discovering that it is slightly denser and smaller than previously believed, and contains a mixture of iron and other elements. The findings, obtained through the first-ever detections of seismic waves on the Martian core, contribute to ou
An artist’s depiction of the Martian interior and the paths taken by the seismic waves as they traveled through the planet’s core. A recent study led by the University of Bristol has provided new insights into the liquid core at the center of Mars, enhancing our understanding of the planet’s formation and evolution.
The findings are all the more remarkable, as the research mission was initially only scheduled to last for a little over one Mars year . Despite Martian storms hastening the accumulation of dust and reducing power to theInSight Mars lander, NASA extended its stay, so geophysical data, including signals of marsquakes, continued to be gathered until the end of last year.
“These first measurements of the elastic properties of Mars’ core have helped us investigate its composition. Rather than being just a ball of iron, it also contains a large amount of sulfur, as well as other elements including a small amount of hydrogen.” Dr Irving said: “So-called ‘farside’ events, meaning those on the opposite side of the planet to InSight, are intrinsically harder to detect because a great deal of energy is lost or diverted away as waves travel through the planet. We needed both luck and skill to find, and then use, these events. We detected no farside events in the first Martian year of operations. If the mission had ended then, this research couldn’t have happened.
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