The usual life of astronauts hides a lot in itselfsurprising. Distant outer space is completely different from the life to which people are accustomed. What are the differences between life in the cozy conditions of the Earth and the surrounding space?

First thing to wear a spacesuit
The first thing that cannot be done in space isbe there without a special spacesuit. A man will not survive and a couple of minutes in an open airless space. Since there is no external pressure, any living organism will face an unenviable fate: the gas bubbles inside will begin to disperse evenly, while the lungs burst and then the mucous membranes of the eyes and mouth boil.
What can not be done in space? Exact time and its slowdown
Even in space it is completely impossible to find out the exacttime. All this happens according to the principles of Einstein's theory of relativity. But do not be afraid - not so difficult. Just on Earth, time flows a few seconds faster than on the ISS. This is due to the fact that in near-Earth orbit the gravitational force is very small (its complete absence is possible only in distant cosmic spaces, where there are no celestial bodies nearby at all). The speed of the ISS reaches incredible values - about 7.9 km / s. And according to the theory of relativity, the absence of gravity and high speed change the course of time. But all this goes relatively without consequences - if, for example, an astronaut spent several months on the ISS. If the far interstellar journey is to be, then when he returns home, he is unlikely to even find his great-grandchildren.

What do stars look like if you look at them without atmosphere?
Чего нельзя сделать в космосе из того, что на Earth seems familiar and mundane? In open space, it becomes inaccessible such a pleasure, how to look at the stars. Indeed, from the surface of the globe, a person sees their flickering through the dense shroud of the atmosphere. People look at the stars in about the same way as through the water column. Therefore, in space, the stars shine in full force.
Simple things: boil the kettle, write with a pen
Писать шариковой ручкой – еще одно занятие, which cannot be done in space. The answer to this problem previously interested many schoolchildren, especially in Soviet times. Why is this happening, and what, then, do astronauts have to write? The fact is that in outer space there is no force of gravity. It is necessary for a regular pen so that the ink gradually approaches its base, and the letter becomes possible. In Soviet times, astronauts wrote with pencils made from wax. After all, graphite rods could break off, and their particles could become a threat to astronauts' breathing. Astronauts from the USA used felt-tip pens.

And also in space it is impossible to make one moresimple action - boil the kettle. This is due to the physics of open space. From the school course, everyone remembers that the higher you rise, the lower will be the boiling point of water. For example, at the top of the mountain kettle boils faster than below, at the foot. And in space, with no pressure at all, water will boil almost instantly.
True, the vapor particles will immediately turn intoice crystals, because in space it is very cold. At interplanetary space stations, water is still boiled. Indeed, inside them, albeit in an artificial way, pressure and temperature are created. On the ISS is done what can not be done in space - water is boiled in a kettle. But this occurs at a temperature of 85 ° C.

Is it possible to use perfume in space?
This is another case from the list that is impossible innear planetary space. It’s possible to air up, of course, but the smell will be too harsh. In general, everything that relates to smells and tastes in space has its own characteristics. For example, food always seems unsalted. Therefore, astronauts supply a variety of spices. The cosmonauts themselves say that the cosmos has the smell of roast steak. And the smell of the moon is like the smell of pea burning.
Thinking game
In many puzzle games and quizzesthe question of what cannot be done in space is proposed. The game "Matryoshka" in "Classmates" is one of the examples of such games. On the Internet, of course, there are a large number of similar games. However, this game is notable for a variety of tasks and topics. Every day new members join it. One of the most interesting questions in this game is “What can't be done in space?”. "Nesting dolls" are gaining their popularity due to the fact that it is possible to significantly expand their horizons with them.