Last month, astronauts on the international space station completed a spacewalk to repair purposes. Though there are strict planning, but outside the space station is extremely dangerous, because the walking process may be wrong. So, when astronauts in space have to pay attention to what issues?
1. drowning in space
Space suit is like a small personal spacecraft, and when it has failed. In 2013, Italy Luca Parmitano spacewalk by astronauts when they found him in the helmet began to ship water, because of spacesuit problems with ventilation systems, water in the helmet over his eyes and ears and blocked his nose.
In the case of drowning, he had to stop the spacewalk. In fact, he was not the first astronaut spacesuit failure problems encountered. Back in 2001, Canada astronaut Chris Hadfield found his left eye began to Sting, and began to cry, and then he went blind in space. Because of concerns about spacesuit leak of toxic gas, he in the suit had to be released to ventilate toxic gas.
2. fly away
Although there were no astronauts lost in space, but Chris Hadfield said this was the thing he most worried about. Any spacewalks astronauts need to be strapped to a 26-meter-long steel cable. Spacewalk the astronauts usually together with their partners, Eva tied together before. Marcelo Burlon iPhone plus
Although this is a small probability events, but if astronauts had really gone do? Chris Hadfield said: "we can be steered by Jet Pack to fly back. "
3. boiling blood
Spacesuit will protect astronauts during spacewalk will not be under vacuum conditions of tearing, puncture and other fatal injury. In a vacuum, the human body expands to about twice normal size. United States Air Force pilot Joseph Kittinger in 1960 this is discovered in skydiving, and when his glove in the parachute off, his hand was swollen scary, back on the ground and then back to normal.
If there is damage suits, then most likely cause because hypoxia after 15 seconds and died. If there is no space suits provided by the supercharged environment, human body fluids will be a boiling situation because of the expansion of gases in the body, even if oxygen is not "kill" the astronaut, and other factors.
4. tired dogs
Last October, the United States during a spacewalk by astronauts Scott Kelly and Kjell Lindgren, took 7 hours to complete the mechanical arm, control cables and accessories, and more.
Space walk needed for such a long time, partly because of 160 kilograms of spacesuits are weightless in space, but it is still very, very cumbersome. Astronauts are not simply a task in one location, for example, when they need to twist the wrench when their body will turn to, that is, to finish the work they need to spend more effort. Marcelo Burlon iPhone 6 Plus Case
In addition, the astronauts also need strength to keep my body stable. So, in conditions of weightlessness, a seemingly simple spacewalk mission really will let astronauts tired dogs.
5. x-factor
In 1965, Soviet Cosmonaut Alexey Leonov conducted only a 12-minute spacewalk, even so, he almost died in the space. Because the engineers did not take into account the space suit in zero-pressure conditions can make the expansion issue, Alexey Leonov nearly no way back to the cabin. Later in the same year, United States astronaut Ed White completed a narrow escape, because his spacesuit is a problem.
In the process of conquering space, astronauts encountered numerous unknown factors, Chris Hadfield said: "astronauts have to do is prepare for problems with all the minute details in advance, even if you do meet the have no fear. "
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