Someone who studies the planet would be called a Geologist. Someone who studies Space would be called an astronaimist. Both work together to gather information about earth.
Someone who studies volcanoes is called a "volcanologist"
Someone who studies the age of a tree by the rings on the inside is called a dendrochronologist
Someone who studies microscopic organisms such as bacteria, algae, etc. is called a microbiologist. A person who exclusively studies viruses, is referred to as a virologist.
If you mean Marine Biologist, it's someone who studies marine life (stuff that lives in the sea)
Someone who studies evolution is called Evolutionary Biologist.
Someone who studies the planet would be called a Geologist. Someone who studies Space would be called an astronaimist. Both work together to gather information about earth.
Someone who studies planetary systems is called a planetary scientist
an areologist
Astronomer
A person who studies language is called a linguist. Linguists analyze the structure, function, and evolution of languages, and may work in various fields such as sociolinguistics, psycholinguistics, and computational linguistics.
Zoologist
An oceanographer and someone who studies sharks is an ithcyologist.
A person who studies seismology is called a seismologist.
A person who studies geography is called a geographer.
Someone who studies matter at a very low temperature is called a cryogenicist.
Someone who studies the planet Mars is called an areologist.