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What does it take to become an astronaut?

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November 19, 2024

TLDR: On a zero gravity flight with Esa, Science correspondent Hannah Devlin talks to Rosemary Coogan, one of Esa's newest recruits, about her rigorous journey from over 20,000 applicants to becoming an astronaut.

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In this insightful episode of The Guardian Science Podcast, science correspondent Hannah Devlin shares her thrilling experiences and discussions surrounding what it takes to become an astronaut. Here’s a summary of key insights from the conversation with Ian Sample.

Experiencing Zero Gravity

Hannah Devlin was chosen to participate in a zero-gravity training flight with the European Space Agency (ESA). This unique experience allowed her to understand the challenges astronauts face during weightlessness:

  • Preparation and Safety: Participants undergo minimal preparation but do receive essential safety instructions and an anti-nausea injection before boarding the specially designed aircraft.
  • Gravity-Free Moments: The flight involved steep climbs and controlled free-fall, enabling about 20 seconds of weightlessness, which feels like a magical experience where traditional concepts of up and down disappear.
  • Physical Reactions: Devlin noted that the sensation of floating was initially bizarre, as our bodies are accustomed to Earth’s gravity. Astronauts can forget their own bodies during extended periods in zero-G, which can make readjusting to gravity upon return quite disconcerting.

The Rigorous Selection Process for Astronauts

To become an astronaut, candidates go through a grueling selection process. Devlin explored the experiences of Rosemary Coogan, one of ESA’s latest recruits, who was selected from over 20,000 applicants.

Key Stages in the Selection Process:

  • Academic Assessment: Candidates must demonstrate capabilities in science, math, and physics.
  • Psychological Evaluation: This component seeks individuals who can work well within a team and adapt to unexpected challenges, crucial for long-duration missions.
  • Diverse Personalities: Selection committees look for unique personality traits, ensuring a variety that can cope with isolation in small groups over extended periods.

Training Beyond Zero-Gravity

Coogan's training experience is diverse and challenging:

  • Science Training: Astronauts need a strong foundation in various scientific disciplines relevant to experiments on the International Space Station (ISS).
  • Survival Training: Coogan underwent winter survival training in the Pyrenees, illustrating the physical and mental challenges involved in an astronaut's preparation.

Life on the International Space Station

Hannah and Rosemary discussed the day-to-day realities faced by astronauts in space:

  • Routine Maintenance: A significant portion of an astronaut's time is dedicated to maintaining the spacecraft, which can feel mundane but is essential for mission success.
  • Health Challenges: Long stints in microgravity can weaken bone and muscle health, requiring about 2.5 hours of daily exercise to stay fit.
  • Social Dynamics: Living in close quarters fosters strong bonds, yet also requires managing interpersonal dynamics, especially during stressful times.

Future Prospects for Astronauts

  • Upcoming Missions: Rosemary anticipates participating in missions to the ISS, with a possible future involvement in NASA’s Artemis lunar missions.
  • Mars Exploration: Both Devlin and Coogan reflect on the long-term goal of sending astronauts to Mars. While there is excitement about these exploratory missions, Coogan differs from some commercial perspectives on colonization.
  • Perspective on Earth: Coogan believes exploring other planets can enhance our understanding of Earth, rather than focusing on establishing permanent off-world colonies, emphasizing the importance of caring for our home planet.

Final Thoughts

Being an astronaut is not just about scientific proficiency; it requires a unique blend of physical endurance, mental resilience, and teamwork. Through Hannah Devlin's firsthand experience and Rosemary Coogan’s journey, listeners gain an understanding of the immense dedication and preparation necessary to embark on the incredible journey of space exploration.

This episode ultimately inspires and educates listeners about the realities of becoming and being an astronaut, highlighting both the challenges and the wonder inherent in such a remarkable career.

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