Tag: atmospheric optics
Crown Flash and Nacreous Clouds: Two of the Sky’s Rarest Light Shows
A beam of light shoots up from a thundercloud and darts across the sky as if it were alive. Months later...
What Is a Fire Rainbow? Rare Circumhorizontal Arc Sightings Across North America
A band of color appears without warning, suspended high in thin summer clouds. It glows in layered reds...