It depends on what you're studying besides black holes. If you're studying planets along with black holes, you could be an astrophysicist. Or, if you're studying atoms along with black holes, you could be a theoretical physicist. Just a few examples.
zoologistZoologist are scientist that study animals
A paleontologist studies the history of plants and animals.
Botanists are people who study plants. Moss are plants, so Botanists study moss too.
The type of scientist who studies the solid and liquid components of gases that constitute the Earth is called a geoscientist or Earth scientist. This field encompasses various specializations, including geology, mineralogy, and hydrology, focusing on the Earth's materials, processes, and their interactions. Geoscientists analyze the Earth's structure, composition, and dynamics to understand natural phenomena and inform resource management.
A biologist is a specific type of scientist specializing in Biology. A scientist can be any type of scientist but their specialty is not specified.
The name for this type of scientist is a teuthologist
A scientist who studies animal life is a zoologist. There is no particular name for a scientist that specialises in platypuses.
The type of scientist that studies the environment is an enviromentologist.
what scientist studies hydrogen and oxygen
A botanist.
An Entomologist
paleontologist
Sedimentologist.
A zoologist.
Meteorologists
a mineralogist
Cosmologist