A moonbow (also known as a lunar rainbow, lunar bow or white rainbow)'s a rainbow produced by the moon rather than the sun. Moonbows are relatively faint, due to the smaller amount of light from the Moon. They're always in the opposite part of the sky from the moon. It's difficult for the human eye to discern colors in a moonbow because the light's usually too faint to excite the cone color receptors in human eyes. As a result, they often appear to be white. However, the colors in a moonbow do… (More on Moonbow)