They also have a similar appearance to the rainbow observed on a mother-of-pearl gemstone. Sign up for our Newsletters This phenomenon among clouds is known as cloud iridescence. It occurs when ...

The images reveal iridescent clouds that resemble a giant feather ... a phenomenon similar to the rainbow on Earth. One ...

While there can be a rainbow-like appearance for several other optical meteorological phenomena (sun dogs, cloud iridescence, etc.), this week's Sunday Science focuses on the classic arch that can ...