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I think the gravitational pull of the earth is natural. Without gravity, anything in the universe would be zero. Because there is no such thing as an independent thing or the only thing, the existence of every thing in the universe depends on the existence of objective things, and this dependence is gravity.
For example, we can think of the earth as a whole one, and this whole is made up of an infinite number of small things. Just like the natural number 1, it is a combination of an infinite number smaller than 1. If there is no gravity, then all the matter on the earth will be separated, can it still be an earth?
Can matter still exist? To put it more clearly, the nine natural numbers from 1 to 9 in mathematics seem to be one number, but they are all a combination, for example, 2 is put together by two 1s, and two 1s can be seen as a whole, and 1 is combined by smaller numbers. Because there is only the smallest natural number in the positive range, there is no smallest number, that is to say, there is no independent or only thing that exists.
In a word, gravity is the driving force of all things, and without gravity, the entire universe would be reduced to zero.
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This is easy to understand, as long as you don't get rid of the first cosmic velocity, then you are still on Earth, bound by the gravitational pull of the earth. When you break the first cosmic velocity, you are out of the earth, that is, you will be subject to the force of other celestial bodies, you also have to be subject to gravity, whether you want to be affected by gravity, according to the force is reciprocal, unless the whole universe has mass for you, otherwise you have to be affected by the gravitational force of other objects, I hope this answer can satisfy you, thank you!
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Of course. Breaking through the second cosmic acceleration allows you to overcome gravity and leave the Earth.
If that's not what you're asking, here's what it means:
When the earth is destroyed, gravity does not exist.
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Yes, that was when the earth didn't exist, not now.
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As long as it is still on the earth, there will be gravitational attraction because there is gravitational attraction between every object.
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On Earth, all objects are subject to gravity. In space, artificial satellites are also moved by the gravitational pull of the earth, even on the moon, which is 380,000 kilometers away. So how far away from the earth does the rent collapse need to be that there will be no gravitational pull on the earth?
In this regard, it is necessary to know the mechanism of gravity and the extent of gravity.
According to Newton's law of universal gravitation, no matter how far an object is from the Earth, it will have a gravitational effect with the Earth. Because in the law of gravitation formula, the gravitational force is inversely proportional to the square of the distance. Therefore, gravity is seen as acting at a distance, no matter how far away an object is, the earth will instantly exert a gravitational force greater than zero on it, and the gravitational pull of the earth will not disappear.
General relativity, however, describes gravity from a different perspective. In Einstein's view, gravity is not an instantaneous over-distance effect, but a spatial almost effect.
In space without any matter and energy, the spatial structure is flat. But if there is matter in space, the structure of space will be bent. In this curved space, the trajectory of other objects, even light, is affected, and this geometric effect manifests itself as gravity.
General relativity further predicts that gravity is not infinitely fast, but exactly the speed of light.
So, which theory describes the gravitational phenomenon more realistically?
It turns out that general relativity is more consistent with observations. Starlight deflection and gravitational lensing can prove that space is bent, and the degree of bending is exactly what the general theory of relativity predicts.
In addition, the direct discovery of gravitational waves also proves the correctness of the general theory of relativity. If gravity is acting at a distance, then there will be no ripples in space to produce gravitational waves. And the speed of gravitational waves is exactly the speed of light, as predicted by general relativity.
Therefore, in the universe far enough away from the Earth, the gravitational pull of the Earth is completely absent because the Earth's existence time and speed of light are finite. It has been 4.6 billion years since the birth of the Earth, which means that the gravitational pull produced by the Earth has traveled outward for 4.6 billion light-years. Theoretically, if the distance from the Earth is more than 4.6 billion light-years, then the gravitational effect of the Earth has not yet spread, so there is no gravitational pull of the Earth.
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