The Branches of Philosophy
Three Fields of Philosophy
Ontology this is the study of the ultimate nature of things.
Epistemology it is scientific knowledge.
Two main concepts. Rationalism (truth can be discovered by reason without physical proof like math or ethics) and Empiricism (truth is discovered by experience and physical evidence like the scientific method) Also A priori and a posteriori. A brief dispute between the two by Stanford Encyclopedia of Philosophy.
Axiology The study of value and worth as in truth, beauty, goodness. (Art or Ethics)
Ethics The study of how to live
Aesthetics The study of beauty and its appreciation.