目标直指中国空间站？马斯克宣布Space X新动作：4400颗卫星集体降轨

Core Viewpoint - The article discusses the escalating technological competition between the U.S. and China, particularly focusing on the recent actions of SpaceX regarding its Starlink satellites, which are perceived as a direct threat to China's space station [1][4]. Group 1: U.S. Actions and Motivations - The U.S. has been imposing sanctions on China since 2019, particularly targeting the semiconductor industry, but the recent focus has shifted to space, specifically targeting China's space station [1][4]. - SpaceX announced a "deorbiting plan" for approximately 4,400 Starlink satellites, lowering them to around 480 kilometers, which brings them dangerously close to China's Tiangong space station, which operates at about 400 kilometers [1][4]. - The U.S. claims that this deorbiting is for safety and to reduce space debris, but this rationale is viewed as disingenuous given the potential risks it poses to other satellites and space stations [7][9]. Group 2: International Norms and Regulations - SpaceX's actions are seen as a violation of international space norms, as large-scale orbital maneuvers should be communicated to international space agencies and relevant countries to avoid collision risks [9][12]. - The lack of proper communication and coordination with international bodies raises concerns about the potential for catastrophic consequences in near-Earth orbit [12][14]. Group 3: China's Response and Capabilities - In response to U.S. actions, China has developed a comprehensive space safety defense, including a "Tianwen" space telescope network for tracking space debris and a laser deorbiting device for immediate threats [13][14]. - China is also leading the drafting of a "Low Earth Orbit Satellite Operation Convention," emphasizing accountability for orbital changes, which could isolate the U.S. in the international community [14].