转自：北京日报客户端 ▶ 习近平率中央代表团抵达乌鲁木齐出席新疆维吾尔自治区成立70周年庆祝活动 中共中央总书记、国家主席、中央军委主席习近平率中央代表团23日下午乘专机抵达乌鲁木齐，出席新 疆维吾尔自治区成立70周年庆祝活动。习近平等在机场和乌鲁木齐市区受到新疆各族群众的热烈欢迎。 中共中央政治局常委、全国政协主席、中央代表团团长王沪宁，中共中央政治局常委、中央办公厅主任 蔡奇等同机抵达。 ▶ 2025北京文化论坛开幕，李书磊出席并发表主旨演讲，尹力致辞 ▶ 防范假借"银龄行动"非法牟利！民政部发布风险提示 | FRAIE FIX 清流人发零搜索的内容 | 氏政为氏 | | --- | --- | | | 民法爱诗 | | 组织机构 新闻中心 变速互动 合首页 信息公开 政务服务 | 展政散振 民政文化 | | 当前位置:百页 > 新闻中心 > 福知公告 > 正文 | | | 关于防范假借"银龄行动"名义开展商业活动牟利的提示 | | | 时间:2025-09-23 来源:民政部门户网站 【字体:大中小】 G打印 = C | | | 近期,有机构成个人假借"银龄行动"名义开展尊业活动单利。为防止群众利益受损 ...

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]

Core Insights - A significant breakthrough in planetary science has been achieved by a team from the University of Science and Technology of China, confirming 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][4] Group 1: Research Findings - The research utilized seismic data from NASA's InSight lander, marking the first confirmation of a solid inner core on Mars, which is a critical step in understanding the internal structure of planets [1][3] - The study identified key seismic phases, including the PKiKP phase, which serves as a direct indicator of the solid inner core, providing strong evidence for its existence [4][5] - The analysis revealed a 30% velocity jump and a 7% density difference between Mars' outer and inner core, indicating a complex internal structure [5] Group 2: Implications - This discovery enhances the understanding of the internal structure of terrestrial planets, confirming similarities between Mars and Earth regarding core-mantle differentiation [5] - The innovative seismic analysis methods developed in this research could serve as a reference for future lunar exploration and the study of other celestial bodies [5] - The findings underscore China's growing capabilities and influence in the field of planetary science and geophysics [5]

Core Insights - The research team from the University of Science and Technology of China, led by Professors Sun Daoyuan and Mao Zhu, has made significant advancements in planetary science by confirming the existence of a solid inner core on Mars with a radius of approximately 600 kilometers [1] - The study indicates that the primary composition of this inner core may be a crystallized iron-nickel alloy rich in light elements [1]

Core Insights - The research provides direct evidence for the existence of a solid inner core on Mars, enhancing the understanding of the planet's evolution and characteristics [1][2] Group 1: Research Findings - The study, led by Chinese scientists in collaboration with U.S. universities, utilized data from NASA's InSight mission to identify evidence of a solid inner core on Mars, estimating its radius to be around 600 kilometers [1] - The research team successfully identified two significant seismic phases: PKKP, which travels through the core, and PKiKP, which indicates the presence of a solid inner core, previously confirmed in studies of Earth and the Moon [1] - The arrival time of the PKKP seismic waves at the seismometer was 50-200 seconds earlier than predicted by models considering only a liquid core, suggesting a high-velocity solid inner core structure [1] Group 2: Future Research Directions - The research team plans to further investigate the mineral composition of Mars' core to deepen the understanding of its evolutionary history [2] - Future studies will also involve dynamic simulations to reconstruct the evolution of Mars' core, providing insights into the origin and evolution of the Martian magnetic field [2] - The methodologies developed in this research may be applied to lunar exploration data to better reveal the deep structural characteristics of the Moon [2]