Woman in the Moon (German Frau im Mond) is a science fiction silent film that premiered 15 October 1929. It is often considered to be one of the first "serious" science fiction films. It was written and directed by Fritz Lang, based on the novel The Rocket to the Moon by his collaborator Thea von Harbou, his wife at the time. It was released in the USA as By Rocket to the Moon and in the UK as Woman in the Moon. The basics of rocket travel were presented to a mass audience for the first time by this film, including the use of a multi-stage rocket.