Trivia: An exec, Sidney Sheinberg, hated the title because he thought it would limit the movie's appeal. In all seriousness, he repeatedly suggested changing the name of the movie to the nonsensical title "Space Men from Pluto." The filmmakers were all utterly dumbfounded. Steven Spielberg replied by sending Sheinberg a note saying they all thought his "joke" about the title was hilarious, greatly embarrassing Sheinberg. He quickly backed off.
TedStixon
2nd Feb 2023