If not in visible stars and galaxies, the most likely hiding place for the matter is in the dark space between galaxies.

In an Oxford lab, graduate researcher David Nadlinger captured a now-iconic image of a single strontium ion suspended between ...

Since auroras concentrate around Earth’s magnetic poles, the best viewing locations for the Southern Lights are those at high ...

Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to ...

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 ...