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 …

6 days ago · 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.

5 days ago · 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 …

6 days ago · The crew will replace a team that evacuated the space station due to a medical emergency in January.

Learn who astronauts are and what they do in space and on Earth.

NASA applies the term astronaut to any crew member aboard NASA spacecraft bound for Earth orbit or beyond. NASA also uses the term as a title for those selected to join its Astronaut Corps.

Feb 13, 2026 · A SpaceX capsule carrying four astronauts arrived at the International Space Station on Saturday, bringing the orbiting laboratory back to full staff after a month of operating with a skeleton ...