This feature video presents Lyndon LaRouche's concept of the physical tensor, an essential aspect of what he has established as a science of physical economy. This concept challenges the underlying problems of belief in sense perception as reality that pervades modern society, by posing the idea of the physical tensor as a transformation which occurs between mental images. This latter quality of thinking is what LaRouche has defined as necessary for the long-term successful survival of the human species in accomplishing a Moon-Mars science driver mission for mankind. The most apt case study of the physical tensor, as repeatedly indicated by LaRouche, is German physicist Karl Gauss's method for determining the orbit of the asteroid Ceres, in 1801. To approach the concept of the physical tensor as illustrated in Gauss's case, you will be familiarized with the important precedents in astronomy: man's early mappings of the celestial sphere, and Johannes Kepler's creation of a new astronomy, based upon his idea of a solar driven system.