Coruscant is a fictional planet in the 'Star Wars' universe. The planet is an ecumenopolis -- the surface is almost entirely covered by one city. The name is derived from Latin coruscant "vibrating, glittering, sparkling". In-universe, however, the name is derived from a type of gemstone called corusca gem. The planet first appeared in the 1991 novel 'Heir to the Empire' by Timothy Zahn and first seen on screen in the 1997 special edition of 'Return of the Jedi' (originally released in 1983). The planet has appeared in numerous Star Wars-related media since then.