热搜！我国规划撞击一颗小行星 2022年美国曾实施小行星撞击试验

Core Viewpoint - China is planning a kinetic impact demonstration mission on an asteroid to validate asteroid defense strategies, as announced by Wu Weiren, the chief designer of China's lunar exploration program [2]. Group 1: Mission Overview - The mission will utilize a "flyby + impact + flyby" model, involving the launch of an observer and an impactor [4]. - The observer will first reach the target asteroid for close observation to gather detailed parameters before the impactor executes a high-speed collision [4]. - The impact will be monitored using advanced imaging techniques to assess the asteroid's trajectory, morphology, and ejecta changes, aiming to evaluate the impact's effectiveness [4]. Group 2: Impact Goals - The mission aims to launch a kinetic impactor at a small celestial body approximately 10 million kilometers from Earth, with the goal of altering its trajectory by 3 to 5 centimeters [4]. - This alteration is intended to prevent the asteroid from potentially colliding with Earth for at least several decades to a century [4]. Group 3: International Collaboration - The mission emphasizes the strategic significance of asteroid detection, defense, and resource development for humanity, aligning with a broad international consensus [4]. - China plans to issue a cooperation initiative to global partners for joint monitoring, payload development, and data sharing [4]. Group 4: Related Research Findings - A recent study published in the "Planetary Science Journal" highlighted that NASA's 2022 asteroid impact test resulted in approximately 16,000 tons of debris being ejected, significantly altering the asteroid's orbit [5]. - The impact caused the asteroid's orbit to change from circular to elliptical, reducing its orbital period by about 33 minutes [5]. - The ejected material provided additional thrust, akin to a brief rocket engine activation, which must be considered in future planetary defense missions [6].