This Dec. 6, 2018 image made available by NASA shows the InSight lander. (NASA via AP)2025-09-03T15:02:53Z CAPE CANAVERAL, Fla. (AP) Scientists revealed Wednesday that Mars innermost core appears to be a solid hunk of metal just like Earths.The Chinese-led research team based their findings on seismic readings from NASAs InSight lander on Mars, which recorded more than 1,300 marsquakes before shutting down in 2022. The spacecraft landed on a broad plain near Mars equator in 2018.Previous studies pointed to liquid at the heart of the red planet. The latest findings indicate the inner core, while small, is indeed solid and surrounded by molten metal a liquid outer core.The Martian inner core extends from the planets center out to a radius of approximately 380 miles (613 kilometers), according to the scientists whose findings appeared in the journal Nature.Its likely composed of iron and nickel, the same ingredients as Earths core, but quite possibly also enriched with lighter elements like oxygen. Mars liquid outer core is bigger, stretching from 380 miles (613 kilometers) to as much as 1,100 miles (1,800 kilometers) from the planets center.Crystallization of Mars inner core may have occurred in the past and still be occurring today, one of the lead investigators, Daoyuan Sun of the University of Science and Technology of China, said in an email. Mars core initially would have been entirely liquid. Its unclear whether the liquid outer core contains any solid material like droplets or whether there might be a mushy zone near the boundary between the inner and outer cores, he added. Stay up to date with similar stories by signing up to our WhatsApp channel. For their study, Sun and his team relied primarily on 23 marsquakes recorded by InSight, all of them relatively weak. The epicenters were 740 miles to 1,465 miles (1,200 kilometers to 2,360 kilometers) away from the lander. Our results suggest that Mars has a solid inner core making up about one-fifth of the planets radius roughly the same proportion as Earths inner core. However, this similarity may be just coincidental, Sun said. While praising the results, the University of Marylands Nicholas Schmerr, who was not involved in the study, said questions regarding Mars core are far from settled. With InSight out of action, there will be no new recordings of marsquakes to further reveal the red planets insides, he noted.There are a lot of details about the exact shape of the inner core and composition of the inner and outer core of Mars that will require a network of InSight like seismometer stations to resolve, Schmerr said in an email.More detailed modeling is necessary to develop a clearer picture of how the inner core formed and what it reveals about the history of Mars magnetic field, said Sun. At present, Mars lacks a magnetic field, possibly because of the slow crystallization of the planets solid core, Schmerr added.___The Associated Press Health and Science Department receives support from the Howard Hughes Medical Institutes Department of Science Education and the Robert Wood Johnson Foundation. The AP is solely responsible for all content. RSShttps://feedx.net https://feedx.site