首次确证！火星存在固态内核

Core Viewpoint - The research team confirmed the existence of a solid inner core on Mars, measuring approximately 600 kilometers in radius, composed mainly of a crystallized iron-nickel alloy rich in light elements, marking a significant advancement in planetary science [1][2][3]. Group 1: Research Findings - The study utilized seismic data from NASA's InSight lander, analyzing 23 high signal-to-noise ratio seismic events to identify key seismic phases that traverse the Martian core [2]. - The identification of the PKiKP seismic phase provided evidence for the solid inner core, with the core's radius constituting about one-fifth of Mars' total radius [2]. - The research revealed a 30% velocity jump and a 7% density difference between the outer and inner cores, indicating a layered structure with a liquid outer core and a solid inner core [2]. Group 2: Implications and Future Research - This research is the first to confirm a solid inner core outside Earth, suggesting a similar core-mantle differentiation structure between Mars and Earth [3]. - The developed seismic methodology for Mars will serve as a reference for future lunar exploration and the study of other celestial bodies' deep structures [3]. - The findings contribute to understanding the evolution of Mars' magnetic field and provide a basis for comparing the internal evolution of Earth and other terrestrial planets [2][3].