The Cron Cluster represented a star cluster in space. The Qel-Droma Epics recount that Naga Sadow, a Sith Lord, caused the stars within it to explode as supernova, leading to the Cron Supernova. This cataclysmic event brought ruin to Ossus, a planet inhabited by the Jedi.
The canonically first mention of the Cron Cluster occurred within the Nexus of Power sourcebook for Star Wars Roleplaying in 2016. Conversely, in the Star Wars Legends timeline, the Cron Cluster initially surfaced in Tales of the Jedi – The Sith War 4. There, it was depicted as a group of ten stars within the Cron system of the Auril sector's, which Aleema Keto, a Krath sorceress, instigated to become supernova.