Boom in the Moon (Spanish: El Moderno Barba Azul) (English: The Modern-Day Bluebeard) is a 1946 Mexican comedy science fiction film directed by Jaime Salvador and starring Buster Keaton.

He wanders into a fishing village and is promptly arrested after being mistaken for a wanted serial killer who marries and murders women (also known as a "bluebeard").

Keaton and another prisoner (Angel Garasa) are put in the custody of an aeronautics scientist who is planning to launch a crewed rocket into outer space.

Salkind would later produce the notable films Austerlitz (1960), the Orson Welles-directed version of The Trial (1962) and the epic Superman (1978) and its sequels.

Although he was not credited with contributions to the screenplay, Keaton incorporated several gags from his classic silent films in this offering, including a horseback riding stunt that was used in Hard Luck (1921) and Go West (1925).

Charles Tatum, in a review published by eFilmCritic.com, stated the "video company that released this must have won the rights to this in a fifty cent poker game.