我国计划向日地L5点发射“羲和二号”

Core Viewpoint - China plans to launch the "Xihe-2" solar probe to the Sun-Earth L5 point between 2028 and 2029, marking a significant advancement in solar observation technology [1][2] Group 1: Project Overview - The "Xihe-2" project was officially launched at a scientific seminar, following the successful deployment of the first solar probe, "Xihe-1," in October 2021 [1] - "Xihe-1" has exceeded its expected operational lifespan and is currently functioning well, paving the way for the new mission [1] Group 2: Technical Aspects - "Xihe-2" will conduct three-dimensional observations of the Sun from a new wavelength and perspective, unlike "Xihe-1," which orbits the Earth [1] - The L5 point, where "Xihe-2" will be stationed, is one of five gravitational balance points between the Earth and the Sun, allowing for stable orbit maintenance with minimal energy consumption [2] - The design lifespan of "Xihe-2" is projected to be seven years, providing a long-term observational capability [2] Group 3: Scientific Significance - With over 70 solar probes launched to date, most are located along the Sun-Earth line, making "Xihe-2" the first probe to reside at the L5 point, offering a new observational perspective for solar research [2]