noun
Academic term for the study of the origin, evolution, and structure of the universe.
彼は宇宙学の研究者として有名だ。
He is famous as a researcher in cosmology.
Compound of 宇宙 (uchū, 'universe') and 学 (gaku, 'study'). The exact historical derivation is uncertain, but it follows the standard pattern for academic disciplines.