意大利上空的红色极光
2023年11月6日 Red Aurora over Italy Image Credit & Copyright: Giorgia Hofer Explanation: What was that red glow on the horizon last night? Aurora. Our unusually active Sun produced a surface explosion a few days ago that sent out a burst of electrons, protons, and more massive charged nuclei. This coronal mass ejection (CME) triggered auroras here on Earth...