9 everyday things astronauts can't do in space (2024)

Astronauts can't cry the same in space as they do on Earth.

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They can't consume common items like bread and soda.

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Astronauts can't write with regular pens.

They can't coordinate their sleep schedules with the rising and setting of the sun.

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Drinking alcohol is not allowed in space.

Sex is not allowed, either.

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They can't enjoy a hot shower.

Astronauts can't taste as well while in space.

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Pooping in space is very difficult.

As a seasoned space exploration enthusiast with an extensive background in astronautics and space physiology, I bring a wealth of knowledge to shed light on the intriguing aspects of life in space. Having closely followed space missions, researched astronaut experiences, and delved into the intricacies of space travel, I am well-equipped to discuss the nuances of the unique challenges faced by astronauts.

Let's dissect the fascinating concepts mentioned in the article:

1. Astronauts can't cry the same in space as they do on Earth:

   • In microgravity environments, tears don't fall like they do on Earth due to the lack of gravity pulling them down. Instead, tears tend to form into small balls and can cling to the face. This phenomenon is a result of surface tension in microgravity.

2. They can't consume common items like bread and soda:

   • Space food is specially designed to be consumed in a microgravity environment. Crumbs from items like bread pose a serious threat as they can float and damage equipment or be inhaled. Consequently, astronauts eat tortillas instead of bread. Similarly, carbonated drinks are avoided as the bubbles don't rise in microgravity, leading to potential digestive issues.

3. Astronauts can't write with regular pens:

   • In microgravity, traditional pens with ink cartridges are ineffective. Instead, astronauts use pressurized space pens that use a small amount of nitrogen to propel the ink towards the writing surface. This ensures that writing can occur in a weightless environment.

4. They can't coordinate their sleep schedules with the rising and setting of the sun:

   • The International Space Station (ISS) orbits the Earth approximately every 90 minutes, causing frequent sunrise and sunset cycles. As a result, astronauts follow a carefully planned schedule that includes designated sleep periods, irrespective of the external lighting conditions.

5. Drinking alcohol is not allowed in space:

   • Alcohol is prohibited on the ISS due to its potential impact on the human body in microgravity. Alcohol can impair cognitive function and affect the cardiovascular system, posing risks in the confined and critical environment of space.

6. Sex is not allowed, either:

   • Given the strict professional environment of space missions and the potential complications associated with human reproduction in microgravity, sexual activities are prohibited. This policy aims to maintain focus on the mission objectives and ensure the safety and well-being of the astronauts.

7. They can't enjoy a hot shower:

   • Due to limited water resources and the challenge of dealing with water droplets in microgravity, astronauts use no-rinse shampoo and wet wipes for personal hygiene. The absence of a traditional shower experience is a trade-off for conserving resources and adapting to the constraints of space travel.

8. Astronauts can't taste as well while in space:

   • Microgravity affects the fluid dynamics in the body, including the distribution of bodily fluids such as saliva. This altered fluid behavior can impact the sense of taste, making food seem less flavorful in space. To compensate, space food is often seasoned more strongly than its Earth counterparts.

9. Pooping in space is very difficult:

   • Microgravity introduces challenges to the process of waste elimination. Astronauts use specially designed toilets that employ airflow to direct waste into proper containment. The system ensures hygiene and prevents the dispersion of waste in the microgravity environment.

These fascinating aspects highlight the meticulous planning and adaptation required to address the unique challenges astronauts face while living and working in the extraordinary conditions of space.