Here are some other related terms:
* Astrophysicist: Focuses on the physical properties and processes of celestial objects.
* Cosmologist: Studies the origin, evolution, and large-scale structure of the universe.
* Planetary scientist: Studies planets, moons, asteroids, comets, and other objects in the solar system.
* Celestial navigator: Uses celestial bodies for navigation.
The specific term you use depends on the exact area of expertise.
