Dictionary.net

the branch of astrophysics that studies the origin and evolution and structure of the universe

The science of the world or universe; or a treatise relating to the structure and parts of the system of creation, the elements of bodies, the modifications of material things, the laws of motion, and the order and course of nature.

The science of the universe: a treatise on the structure and parts of the system of creation.

COSMOLOGICAL.

n. [Greek] The science of the world; —a treatise on the elements or constituent parts of the world, their structure and combination, the laws of motion, and the general order and course of nature.