Like a giant candy.
"In 1906, scientists first discovered the Earth’s core by observing how seismic waves from earthquakes were affected by traveling through it,” UMD's Vedran Lekic, an associate geology professor who co-authored the paper, said in the school's statement. "More than a hundred years later, we’re applying our knowledge of seismic waves to Mars.
"By comparing the time it took those waves to travel through Mars compared to waves that stayed in the mantle... the team estimated the density and compressibility of the material the waves traveled through," the UMD press release notes, adding that ultimately, the researchers concluded that "Mars most likely has a completely liquid core, unlike Earth’s combination of a liquid outer core and solid inner core.
The UMD team also "inferred details about the core’s chemical composition, such as the surprisingly large amount of light elements — namely sulfur and oxygen — present in Mars’ innermost layer," the statement reads. While this discovery is super cool on its own, it could also help aid future research into planet formation — and there's still much to learn.
"Even though the InSight mission ended in December 2022... we're still analyzing the data that was collected," Lekic said. “InSight will continue to influence how we understand the formation and evolution of Mars and other planets for years to come.”
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