The rarest job on Earth is practiced off it: roughly 700 people have ever held it, from Gagarin's 108 minutes to year-long tours on the space station. "Astronaut" is built from Greek — astron and nautes, "star sailor" — and every spacefaring nation has renamed the job in its own image: Russia's kosmonavt sails the universe, China's hángtiānyuán navigates the heavens.
There is no direct door into the job. Every astronaut arrives as something else first — fighter pilot, engineer, physician, biochemist, geologist — and survives a selection that routinely rejects more than 99.9 percent of applicants: NASA chose 10 from over 12,000 in 2021, and ESA chose its 2022 class from 22,523.
Mark each measure High, Any or Low for what you want. The fit number moves with every mark, and your marks follow you to the next page in this app.
| Measure | Astronaut | Astronomer | You want |
|---|---|---|---|
| Resists AI | |||
| Pay | |||
| Barrier to entry | |||
| Autonomy | |||
| Demand | |||
| Impact |
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Scores are the atlas’s 0–100 teaching marks for each topic, not a measurement of you.
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The rarest job on Earth is practiced off it: roughly 700 people have ever held it, from Gagarin's 108 minutes to year-long tours on the space station. "Astronaut" is built from Greek — astron and nautes, "star sailor" — and every spacefaring nation has renamed the job in its own image: Russia's kosmonavt sails the universe, China's hángtiānyuán navigates the heavens.
There is no direct door into the job. Every astronaut arrives as something else first — fighter pilot, engineer, physician, biochemist, geologist — and survives a selection that routinely rejects more than 99.9 percent of applicants: NASA chose 10 from over 12,000 in 2021, and ESA chose its 2022 class from 22,523.
This page follows the profession from the Mercury Seven and Gagarin's Vostok through the Moon landings, the Shuttle's scientist-astronauts and a quarter century of continuous life aboard the International Space Station, into today's commercial crews.
Through a national or commercial selection, entered from another career. NASA requires a STEM master's degree (or a medical degree, test-pilot school, or doctoral work) plus professional experience or 1,000 hours piloting jets; ESA, JAXA, Canada and China run comparable competitions.
This is a reading check for the atlas, not personal advice, a live price, or a booking. It does not replace the full topic page.
Next question: Astronomer · Open the topic: Astronaut
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