What Do Astronauts Do in Space?

Discover the daily tasks and responsibilities of astronauts in space, from conducting experiments to performing spacewalks and maintaining the spacecraft.


Many of us have dreamed about becoming astronauts and exploring the vast unknown of space. But what exactly do astronauts do once they’re up there? Let’s take a closer look at the daily tasks and responsibilities of these brave men and women.

Training and Preparation

Before astronauts even leave the ground, they undergo intensive training to prepare for their mission. This includes learning about the spacecraft, conducting simulations, and developing skills for spacewalks and microgravity environments.

Performing Experiments

One of the main responsibilities of astronauts is to conduct scientific experiments in space. These experiments can range from studying the effects of space travel on the human body to growing plants in microgravity.

Maintaining the Spacecraft

Astronauts are also responsible for maintaining the spacecraft and ensuring that all systems are functioning properly. This includes routine maintenance tasks as well as troubleshooting any issues that may arise.


One of the most thrilling aspects of being an astronaut is the opportunity to go on spacewalks. During these outings, astronauts venture outside the spacecraft to perform repairs, install new equipment, or conduct experiments.

Communicating with Earth

Astronauts also spend a significant amount of time communicating with mission control back on Earth. They provide updates on their activities, relay data from experiments, and receive instructions for their tasks.

Exercise and Health

Maintaining physical health is crucial for astronauts living in space for an extended period of time. They follow strict exercise routines to prevent muscle and bone loss and monitor their health closely to ensure they stay in peak condition.

Examples of Astronaut Activities

  • Scott Kelly spent a year aboard the International Space Station conducting experiments on the effects of space travel on the human body.
  • Chris Hadfield became famous for his viral videos and social media posts documenting life in space.
  • Peggy Whitson holds the record for the most cumulative time spent in space by any NASA astronaut.


Being an astronaut is a challenging and rewarding experience that requires a diverse set of skills and a strong commitment to scientific exploration. From conducting experiments to performing repairs, astronauts play a vital role in advancing our understanding of space and the universe.

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