Abstract
The present study aims to articulate natural science and cosmology in Thomas Aquinas. Accordingly, I want to investigate the conceptions of cosmos by the following question: can the cosmos (world or universe) be the central topic of natural science in Aquinas? I present three conceptions of cosmos in order to reflect upon this question. The first is the metaphysical one in which the cosmos is a hierarchy of entities. The second is related to cosmography according to which the cosmos is a relation of intercalated spheres. The third, finally, is the cosmological conception that understands the cosmos as the set of simple bodies in perennial natural locomotion.
Key-Words:
Natural science; Cosmos; Cosmology; Cosmography; Thomas Aquinas.