NASA 研究揭示“星链”卫星接连坠落与太阳活动显著相关
SpaceX的Starlink卫星自2019年开始发射，最初几年掉落数量较少。然而，2024年出现了异常，卫星掉落数量剧增，去年有316颗卫星在大气层中烧毁，至今共失去583颗卫星。研究发现，这一现象与太阳活动密切相关。太阳的强烈活动通过磁暴加热了上层大气，导致卫星在低轨道上遇到更多阻力，从而加速了它们的坠落。
在太阳活动的周期中，磁暴不仅影响通信，还使得卫星轨道逐渐下降。大多数卫星并非在强磁暴中掉落，而是在中等和弱磁暴期间慢慢失去轨道。低轨道卫星的平均寿命估计为 5 年，太阳活动会以更快的速度导致卫星成群坠落。
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