A rainbow is a multi-coloured arc made by light striking water droplets. And they are actually full circles. It’s just rare to see them from the ground because in most cases your view is obscured.

NBC Washington’s Chopper4 captured footage of this circular rainbow on Friday. Generally, we see a rainbow as an arc, not a circle. What made this one different?

This double full-circle rainbow was seen in 2013 from a helicopter over Perth, Australia. (Photo: Colin Leonhardt, Bird's Eye View Photography) Photos: Other weird weather phenomena spotted in the ...

NBC Washington’s Chopper4 captured footage of this circular rainbow on Friday. Generally, we see a rainbow as an arc, not a circle. What made this one different?