最新遥测数据显示，旅行者1号在太阳系边界撞到了一面看不见的、温度高达30000摄氏度的"火墙"，又 一次为科学界理解日球层与星际介质的交界提供新线索。它还将达成一项里程碑式的成就，预计到2026 年11月，旅行者1号将距离地球一个光日。 曾经被预测会在2025年彻底失联的旅行者1号——这个人类历史上飞得最远的行星探测器，又一次跨过 了新的一年，就像它过去不断创造的奇迹一样。 目前，它正以每秒约17公里的速度，在距离地球255亿公里外沿着银河系向蛇夫座飞去。尽管它已经非 常老了，大多数科学仪器已被关闭，功率输出不足初始时的一半，与地球的通信速率甚至低于20世纪90 年代拨号上网的速度，但它仍然在用最后的力气，为人类传递信息。 这个航行了近半个世纪，推动人类对太阳系认知跃迁的"老家伙"，最初任务计划仅有5年。 1965年，科学家偶然发现，20世纪70年代末，木星、土星、天王星、海王星将罕见地与地球连成一条弧 线。届时，探测器可以像打台球一样，借助行星引力助推，将抵达海王星的时间从30年缩短至12年。 这是一种罕见的天象，据测算，每隔175年才会出现一次。上一次出现还是在拿破仑战争时期，人们还 需要在马背、帆船和独 ...

Core Viewpoint - The keynote speech by Zhang Chaoyang, founder and CEO of Sohu, focuses on the exploration of the solar system and its implications for human civilization, emphasizing the importance of understanding the laws governing the solar system as a key to understanding humanity's past and future [3][4]. Group 1: Solar System Exploration - The solar system operates under specific laws, and understanding these laws is crucial for humanity [4]. - Zhang Chaoyang describes the solar system as a "home" that is both distant and close, highlighting the need for exploration and understanding [4]. - The speech is characterized as a "archaeology" of the solar system, using Newton's laws as foundational principles to explore celestial mechanics [4][5]. Group 2: Human Advancement in Space - The development of AI and aerospace technology is propelling humanity towards a "multi-planet civilization" [3]. - Zhang outlines three key stages for human exploration beyond Earth: the escape phase dominated by Earth's gravity, the Hohmann transfer phase dominated by the Sun's gravity, and the capture phase dominated by Mars' gravity [6]. - The concept of Lagrange points is introduced as stable locations for deploying scientific instruments, such as the Webb Telescope [6]. Group 3: Educational Impact and Media Strategy - Zhang emphasizes the value of learning physics, which aids in understanding both macro phenomena like global warming and everyday experiences [9]. - The physics course has conducted 270 live sessions over four years, accumulating over 26,000 minutes of online content, contributing significantly to the knowledge base [9]. - The integration of traditional teaching with new media is seen as a meaningful approach to disseminating knowledge in the current digital age [9].

Core Insights - The theme of the recent New Year's speech by Sohu's founder Zhang Chaoyang is "The Solar System We Live In," emphasizing the importance of understanding the solar system as a familiar yet distant home [1][3] - Zhang describes the exploration of celestial bodies as foundational to physics, highlighting the contributions of Tycho Brahe, Johannes Kepler, and Isaac Newton in uncovering universal truths [3] Group 1: Theoretical Foundations - Zhang uses Newton's laws as a first principle to logically reconstruct Kepler's laws, demonstrating the elliptical orbits and the relationship between orbital semi-major axes and orbital periods [3][4] - He explains tidal forces and their origins through gravitational potential, noting that extreme tidal forces can even destroy celestial bodies, as seen with Saturn's rings [4] Group 2: Exploration of the Solar System - The first stop in space exploration discussed is the Lagrange points, which are stable points in a two-body system where many space probes, like the Webb Telescope, are deployed [5] - The second stop is Mars, described as Earth's "twin," with a detailed explanation of the three-phase journey to reach it, emphasizing the fuel-efficient Hohmann transfer orbit [5] - The third stop involves the Voyager missions, which utilized gravitational slingshots to accelerate into deep space, showcasing the potential for future space exploration [6] Group 3: Future of Space Exploration - Concerns were raised about Earth's resource consumption and the need for accelerated space exploration, with Zhang indicating that Mars colonization is a distant goal, currently relying on robotic missions for resource collection [6] - Discussions included innovative propulsion methods, such as using comets for gravitational slingshots and solar pressure for spacecraft propulsion [6]

Core Points - NASA's James Webb Space Telescope has discovered a new moon orbiting Uranus, marking the 29th known moon of the planet [1][3] - The new moon, designated S/2025 U1, was found in images taken on February 2, 2023, and is estimated to have a diameter of only 10 kilometers [1][3] - The discovery highlights the complexity of Uranus's moon system and its relationship with the planet's ring system, suggesting a chaotic history [3] Summary by Sections Discovery Details - The new moon was discovered using the near-infrared camera of the James Webb Space Telescope, which captured 10 sets of 40-minute long exposure images [1] - The moon orbits approximately 56,000 kilometers from the center of Uranus, situated between the orbits of moons Miranda and Ariel [1][3] - The moon's nearly circular orbit indicates it may have formed in its current location [1] Scientific Implications - The discovery of this small and faint moon suggests that there may be more complex structures yet to be discovered within Uranus's moon system [3] - Other planets do not possess as many small inner moons as Uranus, indicating a unique and intricate history of its satellite system [3] Observational Technology - The James Webb Space Telescope provides new perspectives for observing the outer solar system, with its high resolution and infrared sensitivity allowing for the detection of previously unseen faint and distant celestial bodies [3]