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美媒:美政府大幅削减NASA预算引担忧,41项科研项目或被终止
Huan Qiu Shi Bao· 2025-06-09 22:36
Core Viewpoint - The significant budget cuts proposed by the U.S. government for NASA are raising widespread concerns about the future of the agency's scientific projects and space exploration initiatives [1][2]. Budget Cuts Impact - The new budget proposal could lead to the termination of approximately 41 ongoing or planned scientific missions, which represents about one-third of NASA's total projects [1]. - NASA's science project funding is set to be reduced by nearly half, marking a critical crisis for the U.S. space program [1]. - The White House's Office of Management and Budget has stated that NASA's annual expenditure of over $7 billion on nearly 100 scientific missions is "unsustainable" [1]. Specific Program Cuts - The budget demands a two-thirds reduction in funding for astrophysics, affecting key missions such as the VERITAS and DAVINCI+ Venus exploration projects, which are now uncertain [3]. - The Chandra X-ray Observatory's operational budget is proposed to be cut from $69 million to zero, jeopardizing its ongoing scientific contributions [3]. - The operational funding for the MAVEN satellite, which has been collecting data in orbit around Mars since 2014, is also set to be eliminated, risking its functionality and potential crash on Mars [3]. Strategic Shift - The proposed budget indicates a fundamental shift in NASA's focus, prioritizing lunar and Martian missions over other scientific endeavors, as the Trump administration aims to send astronauts to the Moon and Mars ahead of China [3].
发射无线电波和X射线的天体现身
Ke Ji Ri Bao· 2025-06-04 01:12
Core Findings - A new cosmic phenomenon named ASKAP J1832-0911 has been discovered, emitting radio waves and X-rays every 44 minutes for approximately two minutes, marking the first detection of such a long-period transient (LPT) in X-rays [1][2] - The discovery was made using the ASKAP radio telescope in Australia, and the signals were correlated with data from NASA's Chandra X-ray Observatory, which was observing the same region of the sky at the same time [1] Summary by Sections Discovery and Significance - Since the initial discovery of LPTs by ICRAR researchers in 2022, scientists globally have confirmed 10 such celestial bodies, but the exact cause of these signals and their unique timing remains a mystery [2] - ASKAP J1832-0911 is hypothesized to be a magnetar or a highly magnetized white dwarf in a binary system, yet existing theories do not fully explain the observed phenomena [2] Implications for Research - The detection of this celestial body in X-rays is significant as it opens new avenues for understanding the nature of such objects, emphasizing the importance of interdisciplinary collaboration among global scientists [2] - This breakthrough not only narrows down the potential identities of these celestial bodies but also provides valuable clues for exploring their true nature by requiring explanations for both X-ray and radio wave emissions [2] Broader Context - The discovery of ASKAP J1832-0911 challenges existing theoretical frameworks for understanding the universe and offers new insights into stellar evolution, suggesting that exploration in this field is just beginning [3]