New Delhi, May 25 (IANS). Why is it necessary for astronauts to remain tied to the space station with a strong rope (tether) during a spacewalk? This question often arises in the minds of many people. Is this just for safety or because of the special conditions of space? Actually, due to microgravity (condition like zero gravity) in space, moving and controlling speed is completely different from Earth. This is the reason why astronauts do not go on spacewalk without a rope.
On Earth we move forward by pushing the ground with our feet, but in space the situation is completely different. There gravity does not end, rather the spacecraft and everything in it are falling together around the Earth. For this reason astronauts experience weightlessness. There is no sense of “above” and “below”. To move in space you have to push or pull on a surface. If you don’t have any surface to produce force or torque (rotation), you lose control of your speed. Once you start spinning, it becomes very difficult to stop without support.
Newton’s laws of motion fully apply there. Astronauts say that if there is a push from the hands or feet during a spacewalk and there is no support, then it may be impossible to cover a distance of just 2 feet. You will not be able to move from one place to another and may keep moving around uncontrollably. This is why astronauts are always tied to the space station with a strong safety rope during a spacewalk.
They also have extra ropes for safety. Even if the main rope falls due to some reason, the backup rope saves them. This tether not only protects them from getting lost, but also helps in controlling movement. Space agencies strongly emphasize that spacewalk is a very risky activity. A small carelessness can put an astronaut in an uncontrolled situation. Therefore, staying tied to the rope is the most important safety rule of spacewalk.
This system not only keeps astronauts safe, but also allows them to confidently perform complex repairs and experiments outside the space station.
–IAANL
MT/VC