Astronaut
Person who commands, pilots, or serves as a crew member of a spacecraft
Has every astronaut survived their space journey?
In 1986, the space shuttle Challenger exploded during launch, killing all astronauts aboard. In 2003, the space shuttle Columbia also exploded, again killing its entire crew. Various other space flights have resulted in fatal disasters.
How many astronauts have died during a mission? Is #1 equal to zero?