WASHINGTON, April 18 (Reuters) - In a memorable image from the 1977 film "Star Wars," the young hero Luke Skywalker gazes at two suns setting above the horizon on his desert planet Tatooine.

On Tatooine, in front of the planet’s binary sunset, Rey buries the lightsabers of Luke Skywalker and Leia Organa. Holy smokes indeed: As revealed in The Rise of Skywalker, Leia trained as a ...