1. The Human Body in Outer Space
On Earth, the human body functions under atmospheric pressure and suitable temperature conditions. In outer space, however, there is no breathable air in the environment and pressure is almost nonexistent.
For this reason, an astronaut needs not only a suit that keeps them warm to go outside the spacecraft, but also a personal system that provides the life conditions required by the body.
2. The Main Function of the Suit
One of the most important functions of a spacesuit is to create a controlled pressure environment around the astronaut. The pressure inside the suit provides the necessary conditions for the human body to function normally.
In addition, supplying the gas needed for breathing and removing the carbon dioxide produced are also among the system's main tasks.
3. Layered Structure
Spacesuits are not simple, single-piece garments. They consist of multiple layers, each with different functions.
While the inner layers are in direct contact with the body, the outer layers provide protection against mechanical damage, temperature changes, and other effects of the space environment.
4. How Is Pressure Maintained?
The air inside the suit creates a pressure environment around the astronaut similar to Earth's atmosphere. In this way, the large pressure difference between the vacuum outside and the astronaut's body is kept under control.
It is also important for the suit to remain flexible; because the astronaut needs to be able to walk, use tools, and move their arms.
5. Breathing System
The spacesuit provides the astronaut with breathable gas. The air circulation inside the helmet allows the astronaut to breathe and prevents the buildup of carbon dioxide produced during respiration.
If this system does not work, it is not possible for the astronaut to work safely in outer space.
6. Protection Against Extreme Temperatures
Temperature conditions in space are not like those on Earth. Surfaces directly exposed to sunlight receive a lot of energy, while areas in shadow can cool down significantly.
The insulating layers of the spacesuit limit heat exchange between the astronaut's body and the external environment.
7. Removal of Heat
The astronaut does not only encounter heat from outside. The human body constantly produces heat, and the accumulation of this heat inside the spacesuit can become dangerous.
For this reason, there is a system inside the suit that removes heat from the body. Thus, during long extravehicular activities, body temperature is kept under control.
8. Liquid Cooling
Special garments located close to the astronaut's body can use circulating liquid to remove body heat. The liquid collects the heat produced by the body and then the system makes it ready to be transferred to space.
This method provides much more effective temperature control than using only thick insulation.
9. Protection Against Sunlight
The energy from the Sun can reach the astronaut's suit directly in outer space. For this reason, the outer layers are designed to reduce the effect of solar radiation.
The outer surface of the suit being light-colored and reflective helps reflect a portion of the incoming solar energy.
10. Micrometeoroid Hazard
Very small rock and metal fragments can travel at high speeds in space. The risk of impacts from these particles, called micrometeoroids, is taken into account in the design of spacesuits.
The outer layers are made of durable materials to reduce the likelihood of small particles reaching the astronaut.
11. The Function of the Helmet
The helmet is not just a part that protects the astronaut's head. It provides the field of vision, houses important parts of the breathing system, and separates the astronaut's face from the space environment.
The protective surfaces on the outside of the helmet also help protect the eyes against intense sunlight.
12. Why Are Gloves Important?
For astronauts to use tools and equipment during extravehicular activities, they need to maintain as much dexterity in their hands as possible. However, the gloves are also under pressure and must be protected from the external environment.
For this reason, a careful balance has been established in space gloves between protection and precise movement capability.
13. The Suit Does Not Only Protect the Astronaut from Vacuum
The function of the spacesuit is not limited to blocking the effects of vacuum. Pressure, temperature, solar radiation, micrometeoroids, and the management of gases necessary for life are all handled within the same system.
For this reason, a spacesuit functions more like a small personal spacecraft than a simple protective garment.
14. The System Required for Leaving the Spacecraft
When the astronaut is inside the spacecraft, the cabin provides the necessary atmosphere and temperature. When going outside, this protection disappears and the suit must provide the conditions required for the mission.
This feature is one of the most important technological elements that make spacewalks possible.
15. Conclusion and Evaluation
Spacesuits protect astronauts from vacuum, extreme temperature changes, solar radiation, and the danger of micrometeoroids, while also ensuring the control of breathing and body temperature.
The layered structure, pressurization, thermal control, and life support systems work together to create an artificial environment in which the human body can function safely under the harsh conditions of space.