I shall simply quote what the SW.com databank says Yoda Homeworld: Unknown Concerning the whills I found nothing on SW.com but CUSWE had this to say: Whills this was an ancient order of Force-sensitive beings, who supposedly died out generations before the birth of the Old Republic. It was believed that the shamans of the Whills could attain a unity with the Force that transcended death, allowing the shamans to influence the living world from beyond the grave. The ability could only be attained for oneself, and only through great compassion. Qui-Gon Jinn managed to discover the technique, and his spirit returned from dead years later to transfer the knowledge to Yoda and Obi-Wan Kenobi. The Journal of the Whills this legendary set of stories is believed to have been told by a higher order of beings, and recounted the events leading up to the advent of the New Order and continuing to tell the story of the Galactic Civil War. It was believed to have had either six or nine chapters, or episodes. At no moment do they say that Yoda may be one.