Definition
An individual designated as an astronaut by the U.S. government — typically employed by NASA, the Department of Defense, or another federal agency — who is assigned to perform duties in space as part of an official government mission. The designation is distinct from commercial astronauts, who fly under private operator authority, and from spaceflight participants, who fly without astronaut duties.
Plain English
A person trained and assigned by the U.S. government to fly in space as part of their official job, as opposed to someone flying for a private company or as a paying passenger.
Context Anchor
Seen in FAA commercial space transportation rules and discussions about who is aboard a launch or reentry vehicle.
Derivation
The word 'astronaut' comes from the Greek 'astron' (star) and 'nautes' (sailor) — literally 'star sailor.' 'Government' specifies that this star sailor flies under federal authority rather than for a private company.
Why Pilots Care
As commercial spaceflight grows, pilots and aerospace professionals need to know which rules and protections apply to which category of space traveler. A government astronaut operates under federal mission rules; a commercial astronaut or spaceflight participant does not.
Intuition Check
Do not read Government Astronaut as just “any astronaut who works for a government.” In this context, the person must be officially designated for that role and carried as part of government-related work.
Example Sentence 1
The mission commander was a government astronaut assigned by NASA, while the two paying passengers on the flight were classified as spaceflight participants.
Example Sentence 2
Government astronauts receive training that differs from requirements for commercial spaceflight participants.