Astronomy Picture of the Day
February 24, 2013
Near the upper latitudes of the planet, in Kvæfjord North Norway, Steve is on a hunt for the Aurora Borealis. Unfortunately, the shiny lights in the sky were gone as quickly as they had appeared. If necessity is the mother of invention, then boredom is the mother of creativity. While waiting for the aurora to reappear, Steve started playing with a flashlight, the moon, and his camera. Here, he managed to create some artificial moon halos and capture the moment on film.
The principle behind moon halos is nearly the same as the one used to create rainbows. It all deals with the refraction of light. Because the moon isn’t as bright as the Sun, its halos tend to be more colorless and bluer in nature.