An astronaut (from the Ancient Greek ἄστρον (astron), meaning 'star', and ναύτης (nautes), meaning 'sailor') is a person trained, equipped, and deployed by a human spaceflight program to serve as a …

Dec 8, 2025 · The term “astronaut” derives from the Greek words meaning “star sailor,” and refers to all who have been launched as crew members aboard NASA spacecraft bound for orbit and beyond.

Dec 17, 2025 · astronaut, designation, derived from the Greek words for “star” and “sailor,” commonly applied to an individual who has flown in outer space. More specifically, in the West, astronaut refers …

3 days ago · After canceling a spacewalk planned for Thursday, the space agency’s administrator said it was erring on the side of caution and bringing a crew of four home in the coming days.

3 days ago · NASA has announced the early return of Crew-11 from the International Space Station after an unidentified astronaut experienced a medical problem.

3 days ago · NASA is evaluating its options for dealing with an astronaut health issue in orbit, one of which is an early end to SpaceX's Crew-11 mission to the International Space Station.

Apr 25, 2025 · Some brave explorers travel across oceans; others blast off into space. This list of famous astronauts celebrates the pioneers of space exploration — those who took "one giant leap" …

3 days ago · NASA announced it's ending a mission to the International Space Station early because of a medical situation involving one of the astronauts aboard the station.

The NASA Astronaut Corps is a unit of the United States National Aeronautics and Space Administration (NASA) that selects, trains, and provides astronauts as crew members for U.S. and international …

As of November 2024, there are 47 active astronauts, 12 management astronauts, and 332 former astronauts or payload specialists, including those who have left NASA, and those who are deceased.