The Empress Teta system was a source of carbonite. The discovery that carbonite could be used to freeze spacers for their long journeys among the stars put an end to the generation ships. Koros Major became a boomworld and one of the strongholds of the Mining Guild. The planet of Polus also had vast quantities of the metal alloy in its frozen wastelands. The inhabitants of Polus played a major role in the freezing process and mining. Imperial Knight Antares Draco was frozen in carbonite in 138 ABY.