Eremology is defined as the systematic study of desert features and phenomena. Therefore, a person who studies the desert is an eremologist.
Eremology is the systematic study of deserts.
You call someone that studies metal a metallurgist.
A physicist.
a person who studies planets is a planetologist.
There is no special name for someone who studies Hebrew.
A numismatist.
A Zoologist
An Anthropologist.
malacologist
euclidist
Gemologists
psychologist
A Technologist. :)