Aridus
a desert planet which was once the site of an Alliance weapons depot. Its atmosphere was filled with ionization energy, making communications and sensor operation on and around the planet extremely difficult. Darth Vader planted an imposter on Aridus, who posed as Obi-wan Kenobi, in an effort to capture Luke Skywalker. The actor became extremely engrossed in his role, believing that he was actually defeating an evil enemy when he killed attacking stormtroopers. This drew Luke closer to him, as well as the native Chubbits that inhabited the planet. The actor eventually came to believe Vader was evil, and destroyed the Ivory Tower in an effort to distract Vader while Luke escaped.