It is called "Space" ... a descriptive title suggestive of the vast volumes of nothingness or 'space' so ubiquitously and homogeneously distributed there.
People who travel in space are called astronauts.
A person who flies in space is called an astronaut.
Anyone who goes into space is called an Astronaut, or Cosmonaut.
A Russian space traveler is called a cosmonaut.
An Expert Aviator is called an "Ace".
A cultures expert is called an ethnologist.
what ia an expert pilot called
A bully expert is called a bullnation
A grammar expert is called a grammatician or a grammarian.
Expert advice or expert guidance.
An expert in his field is often called a specialist or an authority.
an expert on China is called a sinologist.
A cultures expert is called an ethnologist.
Don't know the origin of the word, but a snake expert is called a herpetologist.
The study of earthquakes is called seismology so an earthquake expert should be called a seismologist.
A coin expert is commonly referred to as a numismatist.