astronmer
a person that studies gems is called a gemologist.
A person who studies genealogies is a genealogist.
a person who studies people but not an psychologist
what do you call somebody who studies snails.
A person that studies animals is called a Zoologist.
A person who studies birds is called an ornithologist.
A person who studies birds is called an Ornitholoigst
A sociologist is a person who studies sociology.
A person who studies theology is called a theologian.
Astronomer
A cosmologist
The study is paleontology so I think a person who studies it is a paleontologist.