General:
* Cosmology: The study of the origin, evolution, and structure of the universe.
* Cosmic: Relating to the universe or space.
* Cosmopolis: A large, diverse, and international city.
* Cosmopolitan: Belonging to or characteristic of all the world; not limited to any one country or region.
* Cosmochemistry: The study of the chemical composition of the universe.
More specific:
* Cosmonaut: A Russian astronaut.
* Microcosm: A miniature world or system that is representative of a larger one.
* Macrocosm: The whole universe considered as an ordered system.
* Cosmogonic: Relating to the origin and formation of the universe.
* Cosmometry: The measurement of the universe.
* Cosmotheism: The belief that the universe is a god or is divine.
Let me know if you'd like to explore any of these terms further!