(English proverb). Tree would bend when it bears fruit. (Azerbaijani proverb). Over a long distance, you learn about the strength of your horse; over a long time, you learn about the character of your friend. (Chinese proverb).
For these types of missions the training to prepare astronauts will likely include training as doctors, scientists, engineers, technicians, pilots, and geologists. In addition there will be a focus on the psychological aspects of long-duration missions where crew is largely isolated.ncrement-Specific Training starts only after an astronaut has been assigned to a flight. This phase lasts 18 months and prepares them for their role on their assigned mission. During this phase crewmembers as well as backup crews will train together.
http://www.jsc.nasa.gov/Bios/ Are there age restrictions? There are no age restrictions for the program. Astronaut candidates selected in the past have ranged between the ages of 26 and 46, with the average age being 34. Do you have to be a U.S. citizen to apply for the Astronaut Candidate Program? Yes, you must be a U.S. citizen to apply for the program through NASA, applicants with valid U.S. dual-citizenship are also eligible. It is not recommended that you change your citizenship solely for the purpose of being eligible for the Astronaut Candidate Program.