Explore: Astronaut Performance

An astronaut (from the Ancient Greek ἄστρον (astron), meaning 'star', and ναύτης (nautes), meaning 'sailor') is a person trained, equipped, and deployed

understood. Some astronauts are affected more than others. Earth-based research has demonstrated that sleep loss poses risks to astronaut performance, and that

Moreno Hernández (born August 7, 1962) is a Mexican-American engineer and astronaut. He currently serves as a Regent of the University of California. Hernández

the vestibular system. Space motion sickness can lead to degraded astronaut performance. SMS threatens operational requirements, reduces situational awareness

Astronaut training describes the complex process of preparing astronauts in regions around the world for their space missions before, during and after

competence and an interpersonal dimension for astronaut performance. There is a lack of data that related performance to team composition and cohesion due to

deconditioning effects can impair astronauts' performance or increase their risk of injury. In a weightless environment, astronauts put almost no weight on the

NASA Astronaut Group 2 (nicknamed the "Next Nine" and the "New Nine") was the second group of astronauts selected by the National Aeronautics and Space

group of seven astronauts selected to fly spacecraft for Project Mercury. They are also referred to as the Original Seven and Astronaut Group 1. Their

muscle mass. Over time these deconditioning effects can impair astronauts' performance, increase their risk of injury, reduce their aerobic capacity,