Abstract

Any scientific theory in the natural sciences is an artificial, complex, and abstract construct, consisting of many components (ingredients, constituents, structural elements). It is developed by scientists to gain and comprehend experimentally verified new knowledge about its domain of study. It is helpful to distinguish between two meanings of the term “theory”. The application domains of specific theories include particular kinds of realities. Examples include Newton’s celestial mechanics and various classical, quantum, and quantum-relativistic theories of gases, fluids, molecules, atoms, and elementary particles (theory of atomic spectra, Bohr’s atomic theory, Planck’s quantum theory of black-body radiation, quantum theory of the hydrogen atom, quantum relativistic theory of black holes, etc.). The names of specific theories usually include the names of the types of realities they study. Abstract theories serve as general frameworks for a group of specific theories of the same kind (in particular, macroscopic, microscopic, or megascopic kinds). Examples of abstract theories are classical mechanics, quantum mechanics, and the theories of relativity, which act as common frameworks for concrete theories from classical, quantum, and quantum-relativistic physics, respectively. The article compares concepts of complex structure and development of specific theories with notions of structure and development of automobiles. Such a comparison is more useful and heuristic than analyzing theories in terms of paradigms or interdisciplinary matrices, which, in any case, are not part of scientific theories. The work employed methods of terminological and content analysis of the original text of Newton’s Principia and the comparative method. The aim is to consider Newtonian celestial mechanics as the last universal common ancestor (LUCA) of all particular specific theories. The role of Euclidean geometry as a potential LUCA for abstract theories will be explored in another article. An analysis of Newton’s Principia showed that celestial mechanics encompasses a wider range of components than physicists and philosophers of science typically consider part of a theory. Main results. Taking this theory as a prototype for all specific theories, the article demonstrates the existence of sixteen types of components within it. Components of the same type form a specific subsystem of the theory as a polysystem. In any specific scientific theory, all these subsystems together constitute an interconnected whole that is necessary but not sufficient for generating new knowledge. Conclusions. The article is of a historical-scientific and theoretical-cognitive nature, and the results obtained can be applied in research on the history and philosophy of science, as well as in the teaching of natural science disciplines.