astrononomist
everyone studies science but it is mostly people who like to be a sentient or Astronaut.
An Astronaut.
Anthropology
People who study physics are called physicists.
People that do this are called "rockhounds".
The word astronaut is a noun, a word for a profession of people. The word astronaut is singular, common, abstract noun.
When the scientist studies the stars that's an astronomer, and in space it's an astronaut. The person might also be a father or mother, or a footballer, because people tend to be multi-skilled.
It is called the audiologist.
No astronaut is not a collective noun since it is not referring to a group of people
People who study how people lived in the past are called anthropologists.
a person who studies insects is called an entomologist.
ethnic studies