Avid rainbow spotter Yoav Daniel Bar-Ness captures "an ultra-rare" sight on camera, taking photos of a vertical rainbow in ...

Known as mother-of-pearl clouds due to their iridescent rainbow sheen, polar stratospheric clouds are a rare atmospheric phenomenon that form under extremely cold temperatures—below minus 108 ...

Additional photos of the rainbow clouds were taken by photographer Fredrik Broms, showcasing a colorful series of lights in the sky near Tromsø in Norway.Both sets of photographs can be viewed on ...