I saw an interesting rainbow yesterday.  It actually looked like it was inverted – instead of arching down towards the earth, encircling the earth, the ends appeared to go up as if encircling something in the sky.

From what I found online, the physical explanation is that I must have seen a higher order bow, the 3rd or 4th reflections of the light within the water droplets sending the light forward and creating a bow that encircles the sun.

Keep watch my friends, for we know neither the day nor the hour.

Revelation 4:3
And the one who sat there had the appearance of jasper and ruby. A rainbow that shone like an emerald encircled the throne.