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 …

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 …

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 …

The meaning of ASTRONAUT is a person whose profession is to travel beyond the earth's atmosphere; broadly : any person who travels beyond the earth's atmosphere. How to use …

/ ˈæs·trəˌnɔt, -ˌnɑt / Add to word list a person who is trained for traveling in spacecraft (Definition of astronaut from the Cambridge Academic Content Dictionary © Cambridge University Press)

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 …

Dec 17, 2025 · Achieving spaceflight enabled humans to begin to explore the solar system and the rest of the universe, to understand the many objects and phenomena that are better …

Sep 22, 2025 · To date, NASA has selected 370 astronaut candidates to fly on its increasingly challenging missions to explore space. More are needed to see the space station into its third …

astronaut, Person trained to pilot a spacecraft, operate any of its systems, or conduct research aboard it during spaceflights.

Astronaut, designation, derived from the Greek words for “star” and “sailor,” commonly applied to an individual who has flown in outer space. More specifically, astronauts are those persons …