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References 409 14 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30. 31. 32. 33. . A. Bond, et al., Project Daedalus: The Final Report on the BIS Starship Study, special issue of JBIS, 1978. Clarke, Greetings, 52. Clarke, in Bova and Preiss, editors, 307; lan Crawford, “Where Are They?”, Scientific American, July 2000, 38-43. MacGowan and Ordway, 348; D.F. Spencer and L.D. Jaffe, “Feasibility of Interstellar Travel,” Astronautica Acta, Vol. 9 (1963), 49-59. Robert L. Forward, A National Program for Interstellar Exploration, Malibu, CA, Hughes Research Laboratories Research Report 492, 1975. Freeman Dyson, “Interstellar Propulsion Systems,” in Hart and Zuckerman, editors, 41-45. Forward reviewed propulsion options in his 1986 article “Fea- sibility of Interstellar Travel,” JBIS, Vol. 39 (1986), 379-384, and in “Ad Astra!”, JBIS, Vol. 49 (1996), 23-32. Paul Gilster gave us an updated survey in Centauri Dreams: Imagining and Planning Interstellar Exploration, New York, Copernicus, 2004. Eugene F. Mallove and Robert L. Forward, Bibliography of Interstellar Travel and Communication, Malibu, CA, Hughes Research Laboratories Research Report 460, 1972; Robert L. Forward, Bibliography of Interstellar Travel and Communication—April 1977 Update, Malibu, CA, Hughes Research Laboratories Research Report 512, 1977; Gilster, 20; Eugene F. Mallove and Gregory L. Matloff, The Starflight Handbook, New York, Wiley, 1989; Casti, 389. Robert L. Forward, Starwisp, Malibu, CA, Hughes Research Laboratories Research Report 555, 1983; Yoji Kondo, et al., editors, Interstellar Travel and Multi-Generation Space Ships, New York, Apogee Books, 2003, 57. Gilster, 235. MacGowan and Ordway, 253, 268. Goldsmith, editor, 183. Mallove and Matloff, 23; Kondo, 36-37; Gilster, 12; L.D. Jaffe, et al., “An Interstellar Precursor Mission,” JBIS, Vol. 33 (1980), 3-26; Richard A. Kerr, “Voyager 1 Crosses a New Frontier and May Save Itself from Termination,” Science, Vol. 308 (27 May 2005), 1237-1238; “Voyager Crosses Boundary,” Sky and Telescope, September 2005, 22. Morrison, et al., editors, 1977, 108. Project Daedalus, Special Issue of JBIS, 1978. Achenbach, 147-148; Gilster, 11-13; James Glanz, “Engineers Dream of Practical Star Flight,” Science, Vol. 281 (7 August 1998), 765-767; Warren E. Leary, “NASA Mission Will Explore Solar System’s Frozen Edge,” The New York Times, 15 January 2006. Arthur C. Clarke, introduction to Michael Benson, Beyond: Visions of the Interplanetary Probes, New York, Abrams, 2003, 11; Shostak, Sharing the Universe, 107-109. Tipler, quoted in Kondo, et al., editors, 68. Clarke, quoted in Mallove and Matloff, 4; John Kraus, “Gerard K. O’Neill on Space Colonization and SETI (interview) ,” Cosmic Search, Vol. 1, Number 2 (March 1979), 16-23. Also see Goldsmith, Voyage to the Milky Way, 225-226. Grinspoon, 219. Morrison, et al., editors, 1977, 108.