@universegalaxystar: Astronauts conduct spacewalks, also known as Extravehicular Activities (EVAs), to perform maintenance on the International Space Station (ISS). Here’s how they do it: 1. Preparation Training: Astronauts undergo extensive training on Earth, including simulations in neutral buoyancy pools and virtual reality environments to practice tasks they will perform in space. Planning: Detailed plans are made for the EVA, including task lists, timelines, and tools required. Mission Control on Earth provides support throughout the EVA. 2. Suit Up Spacesuit: Astronauts wear the Extravehicular Mobility Unit (EMU), a specialized spacesuit designed for EVAs. It provides life support, thermal regulation, and protection from space debris and radiation. Pre-breathing Protocol: To prevent decompression sickness, astronauts breathe pure oxygen for about an hour to eliminate nitrogen from their bodies. 3. Airlock Procedures Entering the Airlock: The airlock is a small chamber that astronauts use to transition from the pressurized environment of the ISS to the vacuum of space. Depressurization: The airlock is slowly depressurized to match the vacuum of space. This process is carefully monitored. 4. Conducting the EVA Exiting the Airlock: Once depressurization is complete, astronauts open the outer hatch and carefully exit the airlock. Tethering: Astronauts always stay tethered to the ISS to prevent drifting away. They use safety tethers and handrails strategically placed around the station. Performing Tasks: Tasks may include repairing equipment, installing new hardware, or conducting scientific experiments. Astronauts use specialized tools designed for use in space and communicate constantly with Mission Control. 5. Returning to the ISS Re-entering the Airlock: After completing their tasks, astronauts return to the airlock. They secure the outer hatch before repressurizing the chamber. Repressurization: The airlock is slowly repressurized to match the ISS’s internal atmosphere. Post-EVA Procedures: Once inside, astronauts remove their spacesuits and undergo medical checks to ensure they are in good health after the EVA. 6. Post-Mission Analysis Review and Debrief: After the EVAssstik

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Wednesday 15 May 2024 10:47:35 GMT