NASATech
Glowing Night Clouds Over Sweden

Electric-blue noctilucent clouds glow above Sweden in this astronomy image. Forming high in the atmosphere, these delicate ice clouds catch sunlight after sunset, while the ground below is already dark, creating a striking view of Earth's upper air.
This card is an AI-assisted summary of reporting published by NASA. Read the original report before relying on it for medical, legal, financial, safety, or emergency decisions.