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Home Years before science discovered planets orbiting two stars, Star Wars showed Luke Skywalker facing a twin sunset on his home world Tatooine. Now NASA telescopes have found multiple planets orbiting binary star systems, including Kepler-16b. (NASA/JPL-Caltech) Years before science discovered planets orbiting two stars, Star Wars showed Luke Skywalker facing a twin sunset on his home world Tatooine. Now NASA telescopes have found multiple planets orbiting binary star systems, including Kepler-16b. (NASA/JPL-Caltech)

Years before science discovered planets orbiting two stars, Star Wars showed Luke Skywalker facing a twin sunset on his home world Tatooine. Now NASA telescopes have found multiple planets orbiting binary star systems, including Kepler-16b. (NASA/JPL-Caltech)

Years before science discovered planets orbiting two stars, Star Wars showed Luke Skywalker facing a twin sunset on his home world Tatooine. Now NASA telescopes have found multiple planets orbiting binary star systems, including Kepler-16b. (NASA/JPL-Caltech)

Years before science discovered planets orbiting two stars, Star Wars showed Luke Skywalker facing a twin sunset on his home world Tatooine. Now NASA telescopes have found multiple planets orbiting binary star systems, including Kepler-16b. (NASA/JPL-Caltech)

Fictional Hoth is a frozen tundra that briefly serves as a base for the hidden Rebel Alliance. It’s also the nickname of real exoplanet OGLE-2005-BLG-390, a cold super-Earth whose surface temperature clocks in at minus 364 degrees Fahrenheit (minus 220 Celsius). (NASA, ESA and G. Bacon (STScI))
Super-Earth Kepler-22b may not hide an army of clones, but it may resemble the grey water-world of Kamino with its own super ocean. While the true composition of Kepler-22b’s surface is unknown, an ocean world about the size of Earth could be comfortably habitable. (NASA/Ames/JPL-Caltech)