astronomist
An astronomer studies space, including celestial bodies such as planets, stars, and galaxies. They use telescopes and other instruments to observe and analyze the universe.
a person who studies planets is a planetologist.
A biotechnology scientist.
A scientist who studies life is called a biologist. Biologists study living organisms and their interactions with each other and their environments.
An Oceanographer. Marine Biologist, that sort of thing.
A scientist that studies viruses is called a virologist.
A scientist who studies mollusks is called a teuthologist.
A scientist that studies bears would be called an ursinologist.
virologist
An aviologist.
A meteorologist.
biologist