* Astrophysicist: This is the most common title for a scientist studying the physics of celestial objects like stars, planets, and galaxies. Some astrophysicists specialize in specific areas like star formation or stellar evolution.
* Astronomer: This term is often used interchangeably with astrophysicist, but it can also encompass scientists who focus on observing and studying the universe using telescopes and other tools.
* Cosmonaut/Astronaut: This title is reserved for individuals who have been trained to travel and work in space. While some astronauts might have a background in astrophysics or astronomy, it's not a requirement.
If the scientist you're thinking of specializes in studying stars and planets specifically related to space exploration and potential colonization, they might also be called:
* Planetary Scientist: These scientists study the formation, composition, and evolution of planets and moons within and beyond our solar system.
* Exobiologist: This field focuses on the search for life beyond Earth, and its practitioners often use their knowledge of astrophysics and astronomy to analyze potential habitable environments in the universe.
Ultimately, the most accurate way to describe this scientist would depend on their specific research interests, educational background, and career path.
