Synonymous with astronaut, the term cosmonaut is nevertheless of lesser use although not for this less important in the world of astronautics. When we use the term cosmonaut we are trying to refer to a person who is dedicated to the navigation of the cosmos, that is, to those people who travel in specially prepared ships to outer space and thus navigate outside the limits of planet Earth. While astronautics is a science that has existed for a long time and has produced a prolific number of astronauts or cosmonauts, we can easily say that only a privileged number of people in the history of the world have had the possibility of being considered as cosmonauts due to the intense and deep preparation that they must have since there are always few people who fly on each trip.
The word cosmonaut joins the prefix cosmo with the suffix nauta. The first makes obvious reference to the cosmos, that is, to outer space. The second, nauta, is a suffix that comes from the Greek nauts and what does sailor mean, navigator. It is understood then that the word cosmonaut is used to designate those people who navigate or travel through the cosmos, from outer space.
It is important to note that the exclusivity that a limited number of people have had to become cosmonauts is directly linked to the intense and extensive training that these individuals (male and female) must develop throughout their lives. In order to be a cosmonaut, it is not only necessary to have scientific knowledge useful to the activity (such as astronomy, physics, mathematics and other exact knowledge), but also to develop a type of personality in which elements such as decision-making power are not lacking. , security, confidence, emotional stability, patience, self-control, etc.