亚速尔群岛上空的彩虹气辉
2021年04月18日 Rainbow Airglow over the Azores Image Credit & Copyright: Miguel Claro (TWAN); Rollover Annotation: Judy Schmidt Explanation: Why would the sky glow like a giant repeating rainbow? Airglow. Now air glows all of the time, but it is usually hard to see. A disturbance however — like an approaching storm — may cause noticeable rippli...