A Geologist, Exogeologist, Theoretical Planetologist, and perhaps also an Astronomer
a person who studies people but not an psychologist
a mathematician
caladarian
A cardiologist.
demographist
a person who studies planets is a planetologist.
An astronomer.
A person who studies planets and galaxies is called an astronomer. Is that the answer you were looking for?
A person who studies the planets and stars is an astrologist.
There is a science and a related non-scientific practice:An astronomer is a scientist who observes stars, planets, and other phenomena.An astrologer is a person who determines traits and predicts individual horoscopes based on the positions of the Sun, Moon, stars, and planets.
An astronomer.
astronomist
A person who studies genealogies is a genealogist.
a person that studies gems is called a gemologist.
a person who studies people but not an psychologist
person who studies the stars and planets to predict the future
what do you call somebody who studies snails.