What Would a Rainbow on Tatooine Look Like?

The planet of Tatooine, we learn in Star Wars Episode IV, has two suns. So what would rainbows look like in this astronomical condition quite unlike that of Earth? Randall Munroe of xkcd answers.

It turns out that rainbows always come in orders, but it's rare to see more than one. Sometimes you can see a pair of rainbows. This what is likely to prevail on Tatooine.

To go into detail, it's necessary to determine what kind of solar system Tatooine is. Munroe thinks it's likely to be a circumbinary system in which Tatooine orbits both stars. Because of the necessary geometry of this movement, the rainbows would overlap.

-via The Awesomer