According to a NASA news thread called 'An Iridescent Cloud
Over Colorado', the vivid clouds appear when tiny ice crystals and water droplets linger around multiple clouds in the sky.
They left a glowing iridescent cloud
of gametes, sperm and eggs at the surface.
Experts have nicknamed cloud formations like this"fire rainbows" or "rainbow clouds", however they're scientific names are nacreous, mother-of-pearl or iridescent clouds
Thin iridescent clouds
added to the splendor of the event as seen from the deck of the Paul Gauguin cruising off the coast of the Northern Cook Islands.
It is just one in a class of atmospheric phenomena that includes halos, coronas, glories, iridescent clouds
, and sunrise/ sunset effects.
Silver iridescent clouds
fill the sky, and cut squares and strands of gold and silver paper are scattered like pebbles and stalks on the ground.
But the amazing pastel light show is more likely to have been caused by polar stratospheric clouds, also called nacreous, mother-of-pearl or iridescent clouds
PIONEERS OF THE NEAR SKY--PART II Rainbows, 22[degrees] halos, Sun pillars, iridescent clouds
, the green flash, the purple light--these are just a few of the hundreds of sky phenomena in the fascinating field called atmospheric optics.