央视网消息：中国气象局消息，根据我国"羲和号"卫星观测，近日，太阳发生了一次壮观的日珥爆发事件，大量的等离子体物质和能量被 抛向太空。这次爆发的威力极其强大，划出了一条长达约40万公里的炽热等离子体沟壑，其长度大致相当于地球到月球的距离。 日珥是由太阳等离子体构成的较冷且密集的丝带，它们可以通过磁场悬浮在太阳表面上，当这些日珥变得不稳定时，可能会剧烈爆发，有 时会引发日冕物质抛射，触发地球上的地磁暴，但这次事件发生在太阳的东边缘，并未对准地球，所以没有造成明显的近地空间环境变化。 太阳活动仍处峰年 空间天气灾害还将频发 像这样的日珥爆发事件，如果朝向地球，就可能引起近地空间天气变化。与地球上的"风雨雷电"类似，太阳和地球之间的广袤空间也 有"天气变化"，称为空间天气，主要包括太阳风、地磁暴、电离层扰动等。灾害性空间天气可导致卫星失效、通信中断、导航偏差、电网瘫痪 等重大风险。专家表示，随着太阳活动高年的到来，类似的事件已多次发生，目前太阳活动虽然有所减弱，但仍处于较高水平，未来太阳仍有 可能出现大规模爆发。 太阳活动具有约11年的周期性变化规律，从2019年开始的第25个太阳活动周已进入峰年阶段，2024年和 ...

Core Insights - The Parker Solar Probe has successfully completed another close flyby of the Sun, reaching a distance of approximately 6.2 million kilometers from the solar surface, and traveling at a speed of about 687,000 kilometers per hour, setting new distance records since late last year [1][3] - The probe aims to gather data on the solar atmosphere and solar wind, addressing scientific questions regarding the high temperature of the corona, the acceleration of solar wind, and the origins of high-energy solar particles [2][4] Group 1: Parker Solar Probe's Mission and Achievements - Since its launch in August 2018, the Parker Solar Probe has conducted 24 close flybys of the Sun, leading to significant discoveries such as the magnetic field reversal structure of solar wind and the confirmation of a dust-free zone near the Sun [3] - The probe is equipped with four advanced instruments designed to measure various physical parameters of solar wind and capture images of solar disturbances, ensuring its functionality under extreme solar radiation through a specially designed thermal protection system [2][3] Group 2: Solar Activity and Its Implications - The Sun exhibits an approximately 11-year cycle of activity, currently in its 25th solar cycle, characterized by an increase in sunspot numbers and complex magnetic structures, leading to frequent solar flares and coronal mass ejections that significantly impact the Earth's space environment [3][4] - Other international missions, including the European Solar Orbiter and China's Kuafu-1 and Xihe satellites, are also observing solar activity to enhance understanding of solar phenomena and improve predictive capabilities regarding solar storms, which can affect critical infrastructure on Earth [4]