Interpretations of 2001: A Space Odyssey machines". Kubrick was also confronted with the fact that, during the production of the film, the US and USSR had agreed not to put any nuclear weapons into outer space by signing the Outer Space Treaty. Alexander Walker in a book he wrote with Kubrick's assistance and authorisation, states that Kubrick eventually decided that as nuclear weapons the bombs had "no place at all in the film's thematic development", now being an "orbiting red herring" which would "merely have raised irrelevant questions to suggest this as a reality of the twenty-first century". In the Canadian TV documentary "2001 and Beyond",
Technologies in 2001: A Space Odyssey is 45 degrees south of the lunar equator. Also implausible is the sun reaching its zenith so soon after a lunar sunrise, and the appearance of a crescent Earth near the sun is in complete discontinuity with all previous appearances of Earth, whose position from any spot on the Moon varies only slightly due to libration. Geophysicist Dr. David Stephenson in the Canadian TV documentary "2001 and Beyond" notes that "Every engineer that saw it [the space station] had a fit. You do not spin on a wheel that is not fully built. You have to finish it before you