Space and the environment on the surface of the earth is completely different, so astronauts working and living in the sky, no matter how much they eat and drink Lhasa, can not act as wantonly as on the surface of the earth, and even some people say that astronauts are not allowed to "fart" after entering space.
To know whether this is true or not, we must first find out what a "fart" is. There are a large number of bacteria in our intestines, when food enters the intestine will be decomposed by these bacteria, and the decomposition process will produce gas, in addition, the food we eat can not guarantee complete digestion, which is one of the reasons for the production of gas, and then, some people eat faster, gobble-up will cause air to enter the gastrointestinal tract with food, and this series of gases will eventually be excreted from the anus through the intestine. So everyone produces gas every day, so they fart, and the difference is only that you notice and don't.
If there is gas, what happens if you hold on to it?
Then these gases will be absorbed by the intestine, then into the bloodstream, and then through the blood into the lungs, and finally discharged from the mouth, so the fart can not hold back. Since farts cannot be held back, it is impossible to ask astronauts not to "fart", but it is true to minimize the number of farts in space, because farting in space does bring some problems. What happens if you fart on the surface of the earth? These gases will leave our bodies at a rate of 3 to 10 meters per second, and because the gases themselves are hot, they will rise and spread rapidly, and after a few tens of seconds, we will not smell them, but if it is in a weightless space station, the situation is different.
If you emit some gases in the weightless space station, then these gases will be suspended in place, of course, they will also spread around, but the speed is very slow, and when you turn around and come back, the gas is still waiting for you in place.
Isn't there an air circulation device in the space station? There is, but the air circulation device in the space station is part of a life support system that is designed to maintain the survival needs of astronauts, not to change gas quickly, unless you are emitting gas near the exhaust fan. Because the gas spreads very slowly in a weightless environment, once the "fart" in a place accumulates more, it will produce certain safety hazards, because the "fart" contains methane and hydrogen sulfide, and these two types of substances are the main components of gas, so the "fart" is combustible.
The space station is an isolated space, and all kinds of precision instruments, the most feared is fire, and once the "fart" accumulates more, it will form a fire hazard.
Compared with farting in the space station, farting in a spacesuit is even more of a "fatal" thing. The "spacesuit" sounds like a piece of clothing, but in essence it can be regarded as a small spacecraft, it is a multi-layer structure design, equipped with various life support systems including air treatment systems, urine mobile phone systems, and most importantly, this small spacecraft is completely enclosed. What happens if I fart in my spacesuit? It will be very uncomfortable, because the performance of the air treatment system of the spacesuit is very limited, if the gas emission is too much, then it will always be in a stinky package, sometimes a mission out of the cabin will last for several hours, and the degree of suffering can be imagined.
When it comes to the smell of farts, it is necessary to help "farts" explain that the reason why we feel that "farts" are smelly is not because "farts" are really smelly, but because our sense of smell is too sensitive, in fact, farts are almost tasteless gases.
The main components of "fart" are nitrogen, oxygen, carbon dioxide, hydrogen and methane, these gases basically account for 99% of the "fart", and these gases are obviously odorless, and the only smelly gas in the "fart" is hydrogen sulfide, which accounts for less than 1%, if it is not a human having a well-developed olfactory system, it is impossible to smell this smell. Since farting will bring various problems and safety hazards to astronauts working and living in space, how can we reduce the number of farts?
As mentioned earlier, "fart" is definitely not ok, first of all, it cannot be held back, and secondly, even if it is held, it will come out of the mouth, so the best way to reduce the number of farts is to control the diet.
Under the premise of fully ensuring nutritional intake, astronauts will try to choose foods that produce less gas, such as controlling the intake of protein and the intake of starchy foods can effectively reduce the production of gas in the body. Under normal circumstances, astronauts occasionally emit gases that do not have much impact on space life, as long as it is not the astronauts in the space station who collectively eat bad stomachs, there is no need to pay special attention to the "fart" thing. At present, human beings are still in the initial stage of the space industry, the future with the continuous development of space technology, astronauts' life in space will become more and more convenient, one day, we can even through the gravity simulation system to let astronauts find a down-to-earth feeling in space.