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If you want to become an astronaut, make sure to get excellent grades at the high school and college level as this is a marker of your intellect. Consider getting your bachelor’s degree in a field that will prepare you for working in space, such as math, physics, engineering, or science. After college, you'll need another 3 years experience, which could include piloting, navigation, or computer technology. If you pursue a higher degree in a tangential field, a Masters program counts as 1 year and a PhD program counts as 3 years experience. To learn more about the physical requirements for an astronaut and applying for a job, keep reading!