* Astronomer: This is the most general term for someone who studies celestial objects and phenomena, including planets, stars, galaxies, and the universe as a whole.
* Planetary Scientist: This term focuses specifically on the study of planets, moons, and other bodies within our solar system. They might study the composition, formation, atmosphere, or geology of these objects.
* Astrophysicist: This term refers to someone who studies the physics of celestial objects and processes, such as the formation of stars, the behavior of black holes, or the evolution of galaxies.
Ultimately, the best term depends on the specific area of study.