I am not sure but it may be chronologist.
the study of time itself is called Horology so I'd think they would be a horologist
a person who studies time travel or time altering is called a chronoportationologist
A special telescope that is used to study the Sun's corona is called a coronograph.
They are called astronomers.
A weather scientist is called a meteorologist.
When scientists study plants, it is called Botany.
Scientists who study caves are called speleologists
Scientists who study Earth's surface and interior are called Geologists.
Scientists who study earth's oceans are called oceanographers.
The study of rocks is called Petrology, and the scientists that study them are called petrologists. Petrology is a sub branch of geology.
because they study about Science
The scientists who study genetics are called geneticists.
Scientists who study rocks are called petrologists.
Scientists that study fungi are called mycologists.