This diagram appeared in the 1987 edition of the New Science and Invention Encyclopedia published by H.S. Stuttman, Westport, Connecticut, USA. The article was discussing the purpose of the Pioneer 10 and 11 space probes. Clearly shown is Nemesis a popular name for our suns binary companion, a dead star. (Binary solar systems are apparently the rule in our galaxy, not the exception.). Why does this diagram clearly shows the approximate location of Planet X (a.k.a. the 10th or 12th Planet)? Planet X is presented as a matter of fact in this respected encyclopedia. Some have suggested the paths of Pioneers 10 and 11 were chosen as to get a triangulated fix on Planet X, a suggestion this chart would support.