Originally Posted by
slabeaume
I like taking pictures of the round rainbows often seen on the clouds from above. Anyone else noticed them?
Yup!
The plane was actually causing the diffraction of light in this one, so the rainbow halo was tracking along on the cloud below for a solid 5-10 minutes (long enough for me to get my camera out

)...
Of course, it was above 10K feet, so no risk of being chastised by the FAs for taking it.