Cosmologist (noun)

A scientist who studies the origin, structure, and evolution of the universe.

Origin:

From the greek word "cosmos" meaning "world" and the word "logos" meaning "study".

Examples:

1. The cosmologist proposed a new theory about the formation of galaxies.
2. Cosmologist Stephen Hawking made significant contributions to our understanding of black holes.
3. The cosmologist used data from the Wilkinson Microwave Anisotropy Probe to study the cosmic microwave background radiation.
4. Many cosmologists believe that the universe began with a singularity known as the Big Bang.
5. The cosmologist's research focused on the distribution of dark matter in the universe.