https://youtube.com/watch?v=iL8b3DVooRg%3Fversion%3D3%26rel%3D1%26fs%3D1%26autohide%3D2%26showsearch%3D0%26showinfo%3D1%26iv_load_policy%3D1%26wmode%3Dtransparent

For a moment I thought it was a UFO hidden in a colorful cloud formation but the spectacular rainbow cloud in the sky over Caxias, Brazil is a phenomenon known as an iridescence cloud. Iridescent clouds, known as “fire rainbows” or “rainbow clouds,” occur when sunlight diffracts off water droplets in the atmosphere, mostly seen…

via Amazing Fire Rainbow UFO Cloud in the Sky over Caxias, Brazil — The Event Chronicle