Stern's work is the latest in a series of speculations by scientists to try to explain the find. Some believe that Sedna is a Kuiper Belt object (formed within the orbit of Neptune); others believe that Sedna is an inner Oort cloud object. Scientists have also advanced the theory that Sedna was not created in this solar system at all, but was pulled from a passing star early in the formation of the solar system.
Martin creates a great story of lost love and changing cultures in the novel; it also contains lots of original technology, like the sky-scoots (anti-gravity flying carpets) and High Kavalaan aircars. Dying of the Light was reissued last year in paperback, and I highly recommend it.
Read more about new work on Sedna at Solar system planetoids could be really far out; read more about Sedna at Space.com. See Stay star may have jolted Sedna for alternative views on the formation of distant planetoids.
(This Science Fiction in the News story used with permission from Technovelgy.com - where science meets fiction.)