1. Fred Hoyle, The Nature of the Universe (Oxford, 1950), on pp. iii, 9–10. Hoyle’s comments were first aired in a radio broadcast in 1948:
2. Robert Poole, Earthrise: How Man First Saw the Earth (New Haven, CT: Yale University Press, 2008), 37–9.
3. From Hoyle’s after-dinner speech at the Apollo 11 lunar science conference, 6 January 1970, quoted in Donald D. Clayton, The Dark Night Sky (New York: Quadrangle, 1975).
4. For discussions of this line of argument, see: Frank White, The Overview Effect (Reston, VA: 1998 [1987]);
5. De Witt Douglas Kilgore, Astrofuturism (Philadelphia: University of Pennsylvania Press, 2003);