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 commander or crew member aboard a spacecraft.

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 astronaut in a sentence.

2024年12月25日 · 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 individuals from 41 countries had gone into orbit; 518 of …

This is an alphabetical list of astronauts, people selected to train for a human spaceflight program to command, pilot, or serve as a crew member of a spacecraft. For a list of everyone who has flown in space, see List of space travelers by name. …

2025年1月29日 · Today there are usually seven astronauts living on board at any given time, from a variety of countries. The first class of NASA astronauts was selected in 1959. They are known as the Mercury 7. Since inception, NASA has selected 360 astronaut candidates: 299 men, 61 women; 212 military, 138 civilians; 191 pilots, 159 non-pilots.

2024年10月25日 · CAPE CANAVERAL, Fla. (AP) — A NASA astronaut was taken to the hospital for an undisclosed medical issue after returning from a nearly eight-month space station stay extended by Boeing’s capsule trouble and Hurricane Milton, the space agency said Friday.

The Astronaut Corps is based at the Lyndon B. Johnson Space Center in Houston, although members may be assigned to other locations based on mission requirements, e.g. Soyuz training at Star City, Russia.. The Chief of the Astronaut Office is the most senior leadership position for active astronauts in the Corps. The Chief Astronaut serves as head of the Corps and is the principal adviser to ...

2020年3月4日 · NASA’s astronauts currently work as scientists on the International Space Station—a laboratory that orbits Earth approximately 240 miles above the planet’s surface. Astronauts on the station conduct scientific experiments such as innovative cancer research and research on the human body and living in space.

2024年11月12日 · The NASA Astronaut Fact Book provides information on the 360 explorers who have been selected as astronauts since NASA's first class in 1959.

2025年2月18日 · Prospective ESA astronaut and former British Paralympian John McFall has passed the medical assessment needed for a long-term stay on the International Space Station. If selected for a future ...