Why is the gravitational pull of the sun so great for the Earth and so small for people in space?

The gravitational pull of the sun on Earth is basically the same as the gravitational pull on people in space, and if you think it's different, it's just an illusion.

The creation of the illusion - weightlessness = no gravity?

This illusion is probably caused by the fact that weightlessness occurs in space, and you may think that people who are weightless in space do not experience gravity, whereas on Earth you feel gravity. But in reality, both in space and on Earth, you are subjected to gravity, and that includes gravity from Earth and gravity from the Sun. But on Earth you feel gravity, and in space you are weightless, so you will have the illusion that there is no gravity in space, in fact, it is not that there is no gravity but there is no gravity, these are two concepts.

Gravitational force ≠ gravity.

Looking at the picture above, can you roughly understand? This diagram was originally intended to explain the equivalence principle of general relativity, but it can also be used to understand the difference between gravity and gravity. When you are free-falling in the gravitational field, the gravitational pull on the Earth is actually increasing because the radius is decreasing, but you feel weightless, as if the gravitational force is not there.

On the other hand, when you are in an acceleration frame with no gravitational pull, although there is no gravitational pull, you feel gravity, as if there is a gravitational pull.

For the situation in question, the gravitational pull of the sun on the earth is manifested in the fact that the sun pulls the earth to make a revolution around the sun, which naturally indicates that the earth is subject to the gravitational pull of the sun, so are people in space not affected by the gravitational pull of the sun? Of course, there are, in fact, people in space are moving around the sun in sync with the Earth. That is, astronauts are orbiting the Sun with the Earth at about 30 kms.

Causes of weightlessness in space.

So what is the weightlessness felt by astronauts? In fact, astronauts, like the Earth, are in free fall in a gravitational field! You may wonder why you didn't fall into the sun if you were in free fall.

Because astronauts and the earth do a special kind of free-fall motion - tangential free-fall motion. The direction of their motion is all in the tangential direction of the orbit, so this free-fall motion becomes a circular motion.

There are two factors that determine the magnitude of gravity:

1. The mass of the two objects.

2. The distance between two objects.

Obviously, the mass of man is much smaller than that of the earth, so the gravitational pull of the sun will be much smaller.

Since the sun has gravity, people in space should also be sucked over, and the earth rotates so fast to overcome gravity, won't people in spacewalk be sucked over?

If humans were bigger than Earth, they might have been really attracted away, but not impossible.

You think man is bigger than the earth!

With the continuous development of social economy, in our real life, many friends have a lot of questions, are very curious, especially some scientific questions, I believe that many friends should be very familiar with our living sun, but at the same time there is a big doubt, that is, if there is no sun, will there be gravity on our earth? In fact, according to the information of relevant experts, the gravitational pull of the earth may still exist.

First of all, we have to understand this problem, the rotation of the earth is the result of the gravitational effect of the sun, if the sun does not exist, then the gravitational force of the earth is very likely to exist, but in fact, if the sun does not exist, then there is no way for human beings on the earth to survive, in other words, if the sun disappears, then human beings must also disappear, because in the entire ecosystem, there is a circulation system between the sun, producers, and consumers, so it is impossible to go or lack one of them.

Of course, many people will think that this statement is very one-sided. In fact, according to Einstein's general theory of relativity, the existence of gravitational waves is also related**, the propagation speed of gravitational waves is the same as the speed of light, so many scholars believe that after the sun disappears, the earth will probably disappear after a few minutes with the sun's gravity, but the sun's gravitational force on the earth is considered to disappear, but in fact, the earth will continue to orbit according to the original orbit after that, at this time, the earth's gravitational force still exists, Until the Earth will follow the direction of constant speed and generate a new round of gravitational pull.

In response to this problem, it has been discussed by many scientists, and many netizens have also explained this, but we can also understand that if there is no sun, in fact, the earth will still have gravity, and according to the speed of the reflection, it will eventually be attracted by new celestial bodies and produce new gravity.

The rotation of the earth is attracted by the gravitational attraction of the sun, if the sun does not exist, the solar system does not exist, the earth may exist, but the spatial position of existence will definitely change; If the sun disappears, then human beings will definitely not exist, and the entire biosphere, the sun, producers, consumers, decomposers, and the inorganic environment are indispensable.

If there was no sun, the earth would not exist, let alone the gravitational pull of the earth, because all living beings on our earth need sunlight.

The reason for the occurrence of gravitational force (brief description): When the high-energy particles moving in the universe pass through matter (celestial bodies or particles), part of them are intercepted and absorbed to form a weak energy region (Einstein's space-time curvature), which is the gravitational range mv2=e=mv2 (the formula of the law of conservation of energy conversion). For more details, please see the forthcoming gravitational hypothesis, "Elemental Periods and the Causes of Gravitation".

If there is no sun, the earth will still have gravity, and the earth's gravitational pull is generated by the earth itself and has nothing to do with the sun.

Because there is not only gravity but also repulsion between the sun and the earth, it is this repulsion that ensures that the earth can not be completely controlled by the sun and will not be attracted to it.

Because the movement of the earth around the sun will have a centrifugal force, and the centrifugal force will exactly cancel out the attraction of the sun, so it cannot attract the earth to it.

Because the Earth is also affected by other forces, not only the gravitational pull of the Sun, it does not suck the Earth over.

That's because the Earth also has gravity, so there should be a relatively stable state between the two gravitational forces.

The gravitational pull of the Sun is mainly due to its large mass, which accounts for the mass of the Sun in the entire solar system, and it is because of the strong gravitational pull that other planets orbit the Sun. Although the gravitational pull of the sun is strong, other planets also have a certain centrifugal force, so when the two forces are canceled, the planet will not be sucked by the sun.

The reason why the gravitational pull of the sun is high is because the mass of the sun is large, according to the formula of gravitational force, the greater the mass, the greater the gravitational force, and the mass and gravitational force are directly proportional. The mass of the sun accounts for it in the entire solar system, and the mass of stars in the universe is calculated based on the mass of the sun, which is the basic unit of measurement.

Because of the strong gravitational pull of the sun, other planets orbit the sun, and although the sun has a strong gravitational pull, it cannot drive the entire solar system to move. There is not only one force in the universe, such as gravity, but also centrifugal force, and the combination of various forces can make the movement in the universe uniform.

Other planets attracted by the Sun's strong gravitational pull also have a certain centrifugal force, which is the result of the balance between the forces generated by the rotation of the planets and the forces generated by the inertial motion. The gravitational pull of the sun pulls the planet in the middle, while the centrifugal force pushes the planet outward, so that the two forces cancel out the planet and do not suck it up.