Astronaut

An astronaut, cosmonaut, spationaut or taikonaut (yuhangyuan) is a person who travels into space, or who makes a career of doing so. The criteria for determining who has achieved human spaceflight vary (see edge of space). In the United States, people who travel above an altitude of 50 miles (approximately 80 kilometers) are designated as astronauts. The FAI defines spaceflight as over 100 km (approximately 62 miles). As of October, 2005, a total of 446 humans have reached space according to the U.S. definition (440 people qualify under the FAI definition, while 436 people have reached Earth orbit or beyond). These individuals have spent over 28,000 crew-days (or a cumulative total of 76.7 years) in space including over 100 crew-days of spacewalks. A person who has traveled in space is said to hold astronaut wings. Astronauts from at least 34 countries have gone into space.

Astronaut training

The first astronauts, both in the USA and USSR, tended to be jet fighter pilots, often test pilots, from military backgrounds. U.S. military astronauts receive a special qualification badge, known as the Astronaut Badge upon completion of Astronaut training and participation in a space flight..

Related Topics:
Test pilots - Astronaut Badge

~ ~ ~ ~ ~ ~ ~ ~ ~ ~