There may be a question in everyone's mind why the International Space Station is not built in the orbit of outer space, but in the orbit of inner space. In fact, the International Space Station is about 400 kilometers away from the Earth, and you will find that astronauts who often work in the universe often complete extravehicular figures. Why can't they leave the cabin frequently in outer space, but they can leave the cabin frequently in the inner cabin? Yes, that's what magnetic fields do!

Above our earth, above the atmosphere, there is a huge eggshell, which is the radiation protection belt to protect the earth. We call it a magnetic field. The function of magnetic field is simple. In addition to satellite communication, it also provides a very good protection mechanism, that is, blocking solar radiation.

We know that the energy released by the sun per second is more than the sum of nuclear weapons on the whole earth, so the energy it releases is very terrible. Even though it is 65.438+0.5 billion kilometers apart, the earth can't bear its energy. Powerful solar wind carriers wander in space with charged particles. If these charged particles directly hit the equipment, it will damage the equipment and make the satellite unusable. Moreover, charged particles directly irradiate the skin, which will also cause great harm to the skin. The meaning of this eggshell is to protect the earth from direct attacks by charged particles.

Now, the earth's protective shell has been completely detected by scientists. It is so huge that its diameter can cover the whole earth. It's oval. When the solar wind hits directly, the magnetic field can offset most of the energy, and a small part of the energy will enter the earth, but due to the influence of the atmosphere, it is almost impossible for them to reach the surface.

But not all planets have magnetic fields. The earth's magnetic field is a magnetic field formed by the rotation of liquid metal inside the earth. The kinetic energy generated by the rotation of liquid metal is converted into magnetic energy, so why don't Mars and Venus have magnetic fields? In fact, they also have a magnetic field, but the magnetic field is too small to protect the whole planet.

First of all, the magnetic field determines the core mass of the planet. It is said that ancient Mars had a magnetic field, but after being hit many times, its magnetic field completely disappeared, so its atmosphere was stripped by the solar wind and became today's Mars. Simply put, it is because of the impact of Teia, an iron core planet 4.5 billion years ago that the iron core of our earth became bigger, thus generating a magnetic field. The ancient earth also had no magnetic field!

The appearance of magnetic field is of great significance. Mars and Venus have no magnetic fields, but Jupiter and Saturn have huge magnetic fields. First, their mass is huge, so the rotation of the star core is enough to generate a huge magnetic field. For example, Jupiter's magnetic field is nearly one million kilometers in diameter, which is the largest magnetic field in the solar system! For example, small celestial bodies and satellites can't produce magnetic fields even if they rotate, which is inseparable from the star core of the planet!

The greater the mass of the star core, the stronger the magnetic field, such as neutron stars and magnetic stars. Their nuclei are heavier than the sun, so their magnetic fields are terrible. Anything near them will be torn to pieces. The same principle applies to small celestial bodies. Their nuclei are too small in mass and volume to produce magnetic fields and magnetospheres!