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  1. Astronaut - Wikipedia

    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 …

  2. Astronaut | Definition, Facts, & Training | Britannica

    Nov 28, 2025 · Astronaut, designation, derived from the Greek words for ‘star’ and ‘sailor,’ commonly applied in the West to an individual who has flown in outer space. As of 2022, 587 …

  3. Astronauts - NASA

    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 …

  4. NASA astronaut back on Earth after 8 months on space station

    3 days ago · NASA astronaut Jonny Kim flew home with two Roscosmos cosmonauts from the International Space Station packed tight in their Soyuz spacecraft landing in the frozen …

  5. 15 Famous Astronauts Who Expanded Our Universe

    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 …

  6. ASTRONAUT Definition & Meaning - Merriam-Webster

    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.

  7. Astronaut - New World Encyclopedia

    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.

  8. Astronaut Fact Book - NASA

    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 …

  9. Meet Four Women Astronauts From Across NASA’s History

    Dec 4, 2025 · A new book explores the experiences of all 61 U.S. women astronauts Valerie Neal NASA astronaut and Expedition 64 Flight Engineer Kate Rubins sequences DNA aboard the …

  10. Astronauts and their training programs | Britannica

    astronaut, Person trained to pilot a spacecraft, operate any of its systems, or conduct research aboard it during spaceflights. The term commonly refers to those participating in U.S. space …