(also called ‘cosmonaut‘, mostly referred to a Russian astronaut; plural: ‘astronauts‘; pronunciation: the letters ‘au’ rhyme with the letters ‘au’ in “caught”)
a person (a trained scientist) who travels in space in a space vehicle (a rocket/spacecraft) to study and bring back first-hand information, material and photos from the outer space;
a scientist who is trained to go on a spacecraft as a member of a rocket crew doing such tasks as flying/navigating the craft, participating in research activities in the space,
The first astronaut to set foot on the moon is Neil Alden Armstrong.
The United States NASA has trained number of male and female astronaut who can operate a rocket, do research in the space and even land on other planets.
Though American woman Jerrie Cobb was the first woman to pass the most difficult NASA’s astronaut test, the Russian woman Valentina Tereshkova became the first woman astronaut to go into space in 1963. (This was because NASA did not like a woman to be an astronaut!)