冰岛上空的凤凰极光
2021年01月03日 A Phoenix Aurora over Iceland Image Credit & Copyright: Hallgrimur P. Helgason; Rollover Annotation: Judy Schmidt Explanation: All of the other aurora watchers had gone home. By 3:30 am in Iceland, on a quiet September night, much of that night’s auroras had died down. Suddenly, unexpectedly, a new burst of particles streamed down from...