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The Rukbat Oort Cloud was a nebulous asteroid belt in the Sagittarian sector, and the sixth of its kind discovered by Castor's EEC team. The one in the Rukbat system also contained the voracious organism known as Thread. Particles of this cloud, including Thread, were dragged by the Red Star into Pern's orbit when it passed through the cloud every 250 years. As part of AIVAS's plan to eliminate Thread, the Red Star was seeded with specially designed parasites that would eventually arrive at the Oort Cloud and destroy Thread at its source.
External Sources[]
- Oort cloud on Wikipedia