Lego Space is a science fiction-oriented Lego theme which focuses on astronauts, space colonization, spaceships, and extraterrestrial life. Introduced in 1978, along with Castle and Town, with each of the three themes representing the 'Past' (Castle), 'Present' (Town) and 'Future' (Space). It is one of the oldest and most extensive themes in Lego history, consisting of over 300 individual sets.