How many astronauts are there and how do they live?

As of October 2023, there are over 600 astronauts who have flown to space, with around 40 actively working in various space agencies like NASA, ESA, and Roscosmos. Astronauts live in the International Space Station (ISS) or other missions in a carefully controlled environment, where they share small living quarters, exercise regularly, and conduct scientific research. Their daily routines include work schedules, exercise to counteract muscle and bone loss, and leisure time for relaxation and communication with family. Life in space involves adapting to microgravity, which affects everything from sleeping to eating.