Core Viewpoint - Chinese scientists have confirmed the existence of a solid inner core on Mars, with a radius of approximately 600 kilometers, primarily composed of a crystalline iron-nickel alloy rich in light elements [2][4]. Group 1: Research Findings - The research team, led by Sun Daoyuan and Mao Zhu from the University of Science and Technology of China, collaborated with international scholars to analyze seismic data from NASA's InSight lander, leading to the conclusion about Mars' internal structure [3]. - The study revealed that Mars has a layered core structure, with an outer liquid core and a deeper solid inner core, which was identified through innovative seismic array analysis methods [3][4]. - Seismic data indicated a 30% wave speed jump and a 7% density difference between the outer and inner cores of Mars, suggesting a complex mineral composition that includes elements like sulfur, oxygen, and carbon [4]. Group 2: Implications and Future Research - This research provides significant insights into the evolution of Mars' magnetic field and establishes a critical foundation for comparing the internal evolution of Earth and other terrestrial planets [4]. - The innovative seismic methodology developed in this study offers important references for future lunar exploration and the use of seismology to investigate the deep structures of celestial bodies [4].

Core Findings - Chinese scientists have confirmed the existence of a solid inner core on Mars with a radius of approximately 600 kilometers, primarily composed of a crystallized iron-nickel alloy rich in light elements [1][2] - The research utilized seismic data from NASA's InSight lander, analyzing over 23 high signal-to-noise ratio seismic events to extract critical seismic phases that traverse Mars' core [1] Group 1 - Mars' outer core and inner core exhibit a wave speed jump of about 30% and a density difference of approximately 7% [2] - The inner core is not solely composed of iron and nickel; it may also contain sulfur, oxygen, and carbon, providing insights into the evolution of Mars' magnetic field from an active state to its current dormant state [2] Group 2 - This study is the first to confirm the presence of a solid inner core in a planet outside Earth, supporting the notion of a differentiated core-mantle structure similar to that of Earth [2] - The innovative seismic methodology developed for this research offers significant reference points for future lunar exploration and the use of seismology to investigate the deep structures of other celestial bodies [2]

Core Findings - Chinese scientists have confirmed the existence of a solid inner core on Mars with a radius of approximately 600 kilometers, primarily composed of a nickel-iron alloy rich in light elements [1][2] - The research was published in the journal Nature and involved collaboration between the University of Science and Technology of China and international scholars, utilizing seismic data from NASA's InSight lander [1] Group 1: Research Methodology - The research team employed an innovative seismic array analysis method to analyze data from 23 high signal-to-noise ratio seismic events, successfully extracting key seismic phases that traverse Mars' core [1] - The study highlights the challenges of exploring planetary interiors, noting that the detection of Earth's inner core took decades, while Mars presents even greater difficulties due to weak signals and noise interference [1] Group 2: Findings on Mars' Core Structure - The seismic data indicates a 30% velocity jump and a 7% density difference between Mars' outer and inner cores, suggesting a layered structure with a liquid outer core and a solid inner core [2] - The analysis revealed that Mars' core is not solely composed of iron and nickel but may also contain sulfur, oxygen, and carbon, providing insights into the evolution of Mars' magnetic field [2] Group 3: Implications of the Research - This study is the first to confirm the existence of a solid inner core on a planet other than Earth, supporting the notion of a differentiated core-mantle structure similar to that of Earth [2] - The innovative seismic methodology developed for this research offers important references for future lunar exploration and the study of other celestial bodies' internal structures [2]