The scientific appendix at the end of the book discusses the challenges of such an interstellar mission based on an extensive literature review, and it links these challenges to specific episodes in the novel. Issues that are considered include interstellar propulsion systems, economic considerations of interstellar flight, psychological and sociological factors inherent in a multigenerational space mission, problems with suspended animation, current knowledge of exoplanets, and issues related to colonizing a distant planet and the possible discovery of extraterrestrial life. A history of interstellar missions in science fiction is also reviewed.
Nick Kanas is an Emeritus Professor of Psychiatry at the University of California, San Francisco, where he directed the group therapy training program. For over 20 years he conducted researchin group therapy, and for nearly 20 years after that he was the Principal Investigator of NASA-funded research on astronauts and cosmonauts. He is the co-author of Space Psychology and Psychiatry, which won the 2004 International Academy of Astronautics Life Science Book Award. Dr. Kanas has presented talks on space psychology and on celestial mapping at several regional and World Con science fiction conventions. He has been an amateur astronomer for over 50 years and is an avid reader of science fiction. He is also the author of Star Maps: History, Artistry, and Cartography, Solar System Maps: From Antiquity to the Space Age, and the science fiction novel The New Martians, all published by Springer.
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