Some Coloradans have noticed rainbow clouds over the past few days? This is actually a rare phenomenon called "cloud ...

In the awe-inspiring footage, shot in Haikou city, Hainan, and posted on Aug. 26, the resplendent circle can be seen hovering over a dark cloud like some sort of cosmic shaved ice.

A rainbow cloud is a similar rainbow, halo, sundog, circumhorizontal arc, because it forms due to the diffraction or refraction of light. In 2018, a similar "fire rainbow" was spotted in Vermont.

However, when the stratosphere reaches these lower temperatures, widely spaced water molecules coalesce into tiny ice crystals, forming rainbow clouds. PSCs form over some hilly mountains.

According to NOAA, the phenomenon is "relatively rare" and only happens when a cloud is thin and full of water droplets or ice crystals. Rare nacreous clouds, known as rainbow clouds, form in the ...

They occur when the sun's rays interact with ice crystals or water droplets in the high-altitude clouds. That causes the light to diffract and scatter into a spectrum of the colors of the rainbow.

A rare rainbow-coloured cloud amazed residents in Indonesia. Footage shows the vibrant weather phenomenon in neon red, blue, green, yellow, and violet behind dark clouds in the sky in Tidore city ...

A spectacular movement of rainbow-colored clouds has been spotted in the skies above Scotland. The rare view was captured near Nairn Beach on Christmas Eve, shortly after sunrise around 9 a.m ...

NASA's Curiosity rover has captured images of rainbow-colored noctilucent clouds in Mars' atmosphere. Made of dry ice, these aren't like Earth's clouds.