Why isn t the space station built like a circle in a science fiction movie, relying on centrifugal f

The solar system is always moving, but if you look at a few of the more obvious stars in space, such as the Big Dipper, it seems that he is almost fixed, because its general direction is always in that position, why there is such a certain image unchangedBut what about the fact that some of the stars change? Because the stars that have always been unchanged are basically planets outside the stellar solar system. <>

Big Dipper 7 stars, although he is also a star line, but why is he so bright? Because it is a star itself, or in the hierarchy of the celestial system, it is on the same level as the sun, but it is too far away from us, it is not a planet in the solar system, it is another small galaxy, so it will shine by itself, and the position of the star itself is fixedThe sun itself is moving, but he is also moving, and the two have reached a gradual equilibrium over the past billions of years, so we can see him. <>

There are some stars in space that are moving, not the image you see every day is the same star, but most of the images you see are brighter, either they are **, or the angle from the sun is more special, and the reflection of sunlight on it is more serious, so it looks brighter, but there are countless meteorites in the universe, and you only see a small part of the stars, not all the stars are fixed. Because the solar system rotates at the same time there are some celestial bodiesDue to the gravitational conditions of mass density, the orbit of his orbit is different from that of the Earth, and it will not always appear in the field of vision of the Earth. <>

To be able to see you at night. The starry sky can be said to be quite difficult, because now with the continuous intensification of industrialization, air pollution is getting more and more serious, you can rarely see the starry night sky, but remember that when I was a child, almost 20 years ago, when I just remembered, I could see the sky full of stars almost every nightAt that time, I was curious about what Star Xing was? Now I slowly understand it, but I don't have the longing and nostalgia of my youth.

Humans don't have this kind of technology yet.

In space, it is feasible to create "artificial gravity" by rotating a spacecraft or space station. As the space station rotates, centrifugal force pulls the person outward, a process that can be used to simulate gravity. But it won't be exactly the same.

Because of the greater Coriolis force (a description of the offset of a particle in a rotating system that undergoes linear motion due to inertia, relative to the linear motion produced by the rotating system. The Coriolis force is derived from the inertia of the motion of an object. ) will also appear, so the trajectory will fall into a curve instead of a straight line.

A possible way to create artificial gravity on a space station is to use a rotating system (such as a rotating cylinder, ring, or sphere). Technically, rotation can produce the same effect as gravity, as the centrifugal force it produces is somewhat similar to gravity. By adjusting certain parameters of the space station, such as radius and rotation rate, it is possible to create a force equivalent to gravity on the outer wall.

Tsiolkovsky was raised more than 100 years ago.

In fact, the method of creating artificial gravity has long existed, as early as more than 100 years ago, Tsiolkovsky, known as the father of astronautics, proposed that we can use the "centrifugal force" generated by the rotation of objects to simulate gravity. It should be noted that "centrifugal force" is a virtual force introduced to facilitate the description of non-inertial frame of reference, and its essence is the embodiment of the inertia of an object.

The space station has no gravity. The space station is due to the high-speed operation in space, and the centrifugal force is generated.

It happens to be the gravitational pull of the Earth on it.

offset, so that itself and all objects inside it, including astronauts, are not affected by gravity.

Since calcium is lost in the body's bones in weightlessness, the muscles also atrophy due to long-term non-use. Astronauts can't stay in space for too long, usually only a few weeks or months. Russian cosmonaut Polyakov set a world record for a person living and working in space for 438 days in a row, but this is almost the limit of humanity, he is on the space station.

In order to build muscles and prevent calcium loss, they do a lot of training every day (strapped to a spring on a treadmill), but when they return to Earth, they still can't stand on their feet. It takes a long time to recover.

No way. On the one hand, the current space technology of mankind is not very advanced, and the cost of transporting materials from the earth to space is very high; Another reason is that technology, even if we now combine the forces of the world, we will not be able to build a huge annular space station that can simulate the Earth's gravity.

Simulating gravity is a technology that must be realized in the future, not only on the space station, but also in future space exploration, if there is no gravity system inside the spacecraft, it is difficult for humans to achieve long-term navigation, because the human body can survive for a long time in the absence of gravity or microgravity, which will cause serious damage to the body.

Therefore, in the future, if human beings want to go out of the solar system for interstellar travel and exploration, one of the first problems that the spacecraft needs to solve is to simulate the gravitational environment, and the space station orbiting the earth can be built by building a huge ring structure.

In fact, with the continuous progress of human space science and technology, the future space launch technology will go further, and the cost of space transportation will be greatly reduced.

However, the spacecraft cannot simulate gravity through this method of the space station, and there must be real gravity technology, and it is possible that human beings need to implement anti-gravity technology before it is possible for the spacecraft to realize the simulation of gravity system.

Before human beings have mastered the gravity technology of spacecraft, even if our spacecraft has the ability to fly out of the solar system, it will be difficult for human beings to achieve manned exploration out of the solar system, and at most it will send unmanned exploration spacecraft.

Theoretically, using the centrifugal force of rotating objects, like plants in the space station, due to the lack of gravity, the growth directionality is missing, so scientists use rotation to simulate gravity, so that plant growth has directionality.

In the same way, the rotation of the space station can be regarded as a small room, and at a certain radius and a certain velocity, the space station will generate gravity.

The force exerted on an object due to the attraction of the earth is called gravity. The object of gravity is the center of the earth. The direction of gravity is always straight downwards.

The gravitational force experienced by the object is proportional to the mass of the object, and the calculation formula is: g=mg, g is the proportionality factor, the gravitational force is about, and the gravitational force changes with the change of latitude, indicating that the gravitational force of an object with a mass of 1kg is. The point at which gravity acts on an object is called the center of gravity.

When humans are on Earth, gravity provides the conditions for static measurement of body weight. However, there is no such gravity in space, and weightless astronauts will show 0 if they measure it with a scale.

Scientists very much want to build the space station into a ring that can simulate gravity with centrifugal action, such as the huge space station in "Elysium", of course, that is too big, or the Helms spacecraft in "The Martian" or the Eternity in "Interstellar", which are very good, human beings work and live under simulated gravity, and the recovery time to the ground can be greatly shortened, since there are so many advantages, then why don't we make a circular space station?

A space station with an open atmosphere in Elysium.

The Helms's circular living compartment.

The aircraft in "Interstellar" is more interesting, the whole is a ring, the functional compartments are arranged in a circle, and the middle is the cockpit, isolated by a rotating module!

Undoubtedly, the centrifugal action on the way to simulate gravity is very comfortable, of course, this has some requirements, because the human vestibular organ is extremely sensitive to rotation, and the rotation speed must be controlled within the revolution, if the acceleration is to be achieved, then how large is the diameter of the annular cabin?

The formula for calculating centripetal plus celestial velocity, A is the centripetal acceleration, W is the angular velocity, and R is the radius!

That is, the w requirement is 2 revolutions, about radian seconds.

Then r = that is, if the gravitational acceleration to be achieved is about 2 revolutions per minute, then the radius of this annular structure should reach about 112m!

The size of the ISS is long and wide, but the actual length of the real main truss of the ISS does not exceed 90m, and the entire size of the ISS can not even meet the above radius! The International Space Station has taken 16 countries and regions more than 20 years to slowly accumulate, so you can imagine how difficult it is to have a 111m radius annular space station! More precisely, the following points:

First, the cost, the cost of this huge structure is undoubtedly extremely high!

Second, the transport capacity, with current rocket technology, it is almost impossible to assemble such a huge space station!

3. At this stage, artificial gravity is required for the space station

For the sake of the above, it is completely understandable that the space station is not designed with artificial gravity, we must have it, and only then can we think about comfort! Therefore, even for a long time to come, it is unlikely that this design will be adopted, unless our rocket technology has improved by leaps and bounds, otherwise look at the classic structure of the ISS!