The green flash is a rare, brief optical event of green, yellow, and sometimes blue that colors the horizon, occurring at ...

Noctilucent clouds, Earth's highest clouds, shine blue in the twilight sky from late May to August in the northern hemisphere ...

But its distinct water-like waves makes it a favorite among ... fluctus clouds are more likely to appear around sunrise or sunset, which is when lower clouds are cool and upper clouds are warm.

Lisa Covey traveled to Newfoundland earlier this summer and caught this unique photo around sunset in Rocky Harbour. There is ...

MAINE (WGME) --Have you ever seen wavy clouds in the sky? Like these? If so, you caught some rare Undulatus asperatus clouds, ...

Visible light travels in electromagnetic waves, which we see as the colors ... the particles that would block light. Clouds also affect what a sunset will look like. If the sky is full of clouds ...

At the time those clouds appeared Tuesday, strong low pressure was developing over the Plains. It was swinging a cold front east, causing waves of rain and isolated thunderstorms across the Midwest.