Stargate Atlantis ran as a television spin-off of Stargate SG-1 from 2004 to 2009, following a team exploring the lost Ancient city of Atlantis in the Pegasus galaxy. Its Stargate used the same dialling system as earlier series, with chevrons locking each symbol in sequence before a wormhole opened. Fans ripped and shared the short gate sounds from episodes and later soundboards, and the chevron clip remains a shorthand cue for sci-fi travel, used in fan edits, streams and memes long after the show ended.