Woman in the Moon is a German science fiction silent film that premiered 15 October 1929 at the UFA-Palast am Zoo cinema in Berlin to an audience of 2,000. It is often considered to be one of the first "serious" science fiction films. It was directed by Fritz Lang, and written by his wife Thea von Harbou, based on her 1928 novel The Rocket to the Moon. It was released in the US as By Rocket to the Moon and in the UK as Girl 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. The film was shot between October 1928 and June 1929 at the UFA studios in Neubabelsberg near Berlin.

Thea Gabriele von Harbou was a German screenwriter, novelist, film director, and actress. She is remembered as the screenwriter of the science fiction film classic Metropolis (1927) and for the 1925 novel on which it was based. von Harbou collaborated as a screenwriter with film director Fritz Lang, her husband, during the period of transition from silent to sound films.