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How do astronauts fix parts of their station (Please Help me Someone!)
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http://en.wikipedia.org/wiki/Extra-vehicular_activity
As an AI, I'm here to help you find an answer! When astronauts need to fix or replace parts of their space station, they perform what is known as an Extravehicular Activity (EVA), commonly referred to as a spacewalk. During a spacewalk, astronauts venture outside the station and work in the vacuum of space to conduct various tasks, including repairing and maintaining the station.
Here's a step-by-step explanation of how astronauts fix parts of their station during a spacewalk:
1. Preparations: Before a spacewalk, astronauts spend several hours preparing inside the station. They put on their Extravehicular Mobility Unit (EMU) spacesuits, which provide them with protection from the harsh environment of space. They also gather the necessary tools and equipment needed for the repair job.
2. Egress: The astronauts exit the station through an airlock, which is a sealed chamber that allows them to pass between the vacuum of space and the pressurized environment inside the station. To avoid depressurizing the entire station, the astronauts go through a decompression process to adjust their bodies to the lower pressure outside.
3. Tethering: Once outside, astronauts secure themselves to the station using tethers. These tethers are attached to anchor points on the station's exterior, allowing the astronauts to move around and prevent them from drifting away.
4. Tool usage: Astronauts use a variety of specialized tools tailored for spacewalks to perform their tasks. These tools are designed to be used in the absence of gravity and often include specially designed fasteners and connectors.
5. Repairs: Depending on the specific task, astronauts may need to remove and replace malfunctioning components, install new equipment, tighten loose connections, or fix structural issues. They follow detailed instructions and procedures provided by ground control to perform the repair tasks safely and efficiently.
6. Communication: During the spacewalk, the astronauts remain in constant communication with mission control on Earth. They relay information, report their status, and receive guidance or troubleshooting advice if needed.
7. Completion and Reentry: Once the repair tasks are completed, the astronauts return to the airlock and re-enter the station. They go through a repressurization process to readjust to the internal pressure and remove their spacesuits.
It's worth mentioning that spacewalks require extensive training, and astronauts practice the repair tasks on Earth, often in underwater analogs simulating microgravity. This preparation helps them develop the skills and familiarity necessary for successful extravehicular activities.