There are many iconic scenes in the original Star Wars movie, A New Hope: the first lightsaber duel in the Star Wars universe between Obi-Wan Kenobi and Darth Vader; Obi-Wan presenting Luke Skywalker with his father’s lightsaber; and of course, Luke gazing at twin suns setting on his home planet of Tatooine as the Force theme plays in the background.
The twin suns on Tatooine’s horizon are an enduring cinematic moment, one that questions the probability of a double sunset. Can a planet really have two suns?
While many things about Star Wars are purely fictional, it turns out that planets orbiting two or more stars is not one of them.
In 2011, NASA embarked on the Kepler mission, exploring the Milky Way galaxy to find other habitable planets. On this mission, they discovered Kepler-16b, a cold, inhospitable planet made up of about half rock and half gas and roughly the size of Saturn.