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The only truly amazing aspect of 3I/ATLAS is its origin. As an interstellar comet, it comes from a solar system far beyond our own, offering us a literal snapshot of another stellar neighbourhood. 'We ...

迅速增长的卫星群引起了学界的强烈关注。卫星的反射光肉眼可见，对于专业望远镜而言非常明亮。这些轨迹已经影响了全电磁波谱的天文图像，在运行和校正方面付出了显著的成本。 与普遍看法相反，卫星轨迹不仅影响地面天文台，还影响哈勃太空望远镜等太空天文台。然而，目前在轨卫星数量只是未来十年计划发射卫星的一小部分（不到3%）。 研究组基于电信行业提出的卫星群计划，对一系列国际近地轨道望远镜的卫星轨迹污染程度进行了 ...