Numismatics is the study of coins.
Numismatics
what is the name given to the study of migration
Seismology.
zoology
metricology?
Astronomer
This is a chemist.
botany methinks :)
the name given to the study of animals
Ethology.
Scientists who study the universe are known as cosmologists.
The collection and study of money (coins, in particular) is called numismatics or numismatology.