空间科学
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嫦娥六号月球样品最新研究成果发布 为人类首次揭开月背演化史
Huan Qiu Wang Zi Xun· 2025-07-09 16:10
Core Viewpoint - The research progress from China's Chang'e 6 lunar mission has unveiled significant findings about the Moon's far side, marking a milestone in lunar and planetary science [2][4]. Group 1: Research Achievements - Four groundbreaking research results have been published, revealing the history of volcanic activity, ancient magnetic fields, water content in the mantle, and mantle evolution characteristics of the Moon's far side [2][4]. - The studies indicate that the far side of the Moon experienced two distinct phases of basaltic volcanic activity approximately 4.2 billion and 2.8 billion years ago, suggesting sustained volcanic activity [5]. - The research also uncovered ancient magnetic field information, indicating fluctuations in the Moon's magnetic field strength around 2.8 billion years ago, challenging previous assumptions of a monotonous decline [5]. - The water content in the far side's mantle was found to be significantly lower than that of the near side, indicating a dichotomy in the Moon's internal water distribution [5]. - The basalt samples from the far side were identified as originating from a highly depleted source region, suggesting that large impact events may have significantly influenced the Moon's deep-layer evolution [5][7]. Group 2: Collaborative Efforts and Future Directions - The Chinese Academy of Sciences has coordinated efforts among various research institutions to maximize the scientific output from the Chang'e 6 samples, demonstrating a strong commitment to advancing space science [4][9]. - The findings from the Chang'e 6 mission are expected to enhance understanding of lunar evolution theories and promote deeper integration of academia and industry in space science [4][9]. - The research on the South Pole-Aitken basin, one of the Moon's largest impact craters, has provided new insights into the effects of large impacts on lunar evolution, marking a significant contribution to the field [7][9].
超期服役的哈勃望远镜再续传奇
Ke Ji Ri Bao· 2025-05-19 22:30
Core Viewpoint - NASA celebrates the 35th anniversary of the Hubble Space Telescope, highlighting its significant contributions to space science and its ongoing relevance despite plans for a successor [4][6]. Group 1: Hubble's Achievements - Hubble has transformed human understanding of the universe, providing vivid images and numerous scientific breakthroughs since its launch in 1990 [4]. - The telescope has conducted nearly 1.7 million observations of approximately 55,000 astronomical targets, leading to over 22,000 published papers with more than 1.3 million citations [8]. - Hubble's unique ability to capture ultraviolet light allows it to observe celestial phenomena that ground-based telescopes cannot, achieving ten times the clarity of traditional ground-based observations [7]. Group 2: Current Status and Popularity - Despite being operational for 35 years, Hubble remains one of the most sought-after astronomical instruments, with the number of scientists applying for observation time being six times greater than the available slots [8]. - Hubble's data archive exceeds 400 terabytes, showcasing its extensive contributions to astronomical research [8]. Group 3: Future Considerations - Hubble is currently beyond its intended operational lifespan, with the last maintenance mission conducted 16 years ago, raising concerns about its future viability [9]. - NASA faces budget constraints, with funding expected to decrease significantly, complicating any potential maintenance or operational extension for Hubble [10].