“探日”新篇！我国计划向日地引力平衡L5点发射“羲和二号”

Core Viewpoint - The "Xihe-2" solar exploration project is set to launch between 2028 and 2029, marking a significant advancement in China's solar observation capabilities, following the successful deployment of the "Xihe-1" satellite in 2021 [1][2]. Group 1: Project Overview - The "Xihe-2" project is a collaborative initiative led by Nanjing University and the Eighth Academy of Aerospace, aimed at addressing national space security needs [1]. - The project is named after "Xihe," a figure from ancient Chinese texts symbolizing the sun, reflecting the cultural significance of solar observation in China [1]. Group 2: Technical Aspects - "Xihe-2" will operate from the L5 point, one of five gravitational balance points between the Earth and the Sun, allowing for stable orbit with minimal energy consumption and a design lifespan of up to 7 years [2][3]. - The satellite will provide a new observational perspective, enabling detailed measurements of solar magnetic fields and activities, and contributing to the establishment of a comprehensive three-dimensional physical model of solar eruptions [3]. Group 3: Scientific Contributions - The satellite's location at the L5 point will allow it to observe solar activities, such as solar flares and coronal mass ejections, up to four to five days in advance compared to Earth-based observations, enhancing space weather forecasting capabilities [3]. - This advance warning will provide more preparation time for Earth in response to potentially hazardous solar events [3].