Building himself a large starship, the Collector set forth, stopping at every inhabited world he found to acquire a sample of their finest achievements as well as living representatives of the world's life-forms. In a matter of years, his ship was completely filled, and the Collector was forced to suspend his mission in order to build expanded facilities for his permanent collection. With the aid of robo-mechanics acquired from the planet Cron, the Collector converted several uninhabited planets into giant museums, and transferred his collection there. Every time his ship's hold was filled, he would return to the museum-worlds to deposit his recent acquisitions. At present, the Collector has filled ten museum-worlds with artifacts from a hundred thousand planets.