An astronaut (from the Ancient Greek ἄστρον (Astron), meaning 'star', and ναύτης (nautes), meaning '), meaning 'sailor') is a person trained, equipped, and deployed by a human spaceflight program to serve as a commander or crew member aboard a spacecraft. Although generally reserved for professional space travelers, the term is sometimes applied to anyone who travels into space, including scientists, politicians, journalists, and tourists.

data taken from : https://www.supercluster.com/