Bright Sword starts with the grenade flat.

Chapter 520: Subverting the Perception of Gravity

Therefore, in reality, nothing happened on the spacecraft; it was just that the hatch spaces were misaligned.

Or to put it more bluntly, the space link at the hatch of the spacecraft has been changed.

Of course, these are not very important. What is more important is that after research, it was found that the space weapons made by this prehistoric civilization were actually not perfect.

This thing has a major flaw, which is that there is not enough energy. Yes, there is not enough energy. Although it can change the space, this change is also very energy-consuming. Therefore, this change cannot last long. Prehistoric civilization did not solve the energy problem.

It is for this reason that this thing was modified so that it can absorb any energy rays and restore its energy state.

However, as Wandering Blue Star conducted in-depth research on this space weapon left over from prehistoric civilization, it actually gave Wandering Blue Star a deeper understanding of space.

This method allowed the Wandering Blue Star to successfully invent a way to deal with the space stones invented by prehistoric civilizations.

Of course, these are not the most critical things. The most critical thing is that it broke the scientists of the Wandering Blue Planet's consistent understanding of gravity and space. The scientists of the Wandering Blue Planet no longer believe that gravity distorts space, and that gravity can affect space but cannot affect time. Of course, this discovery naturally subverts the previous understanding of gravity by humans on the Blue Planet.

You know, people discovered gravity more than two thousand years ago, but there has never been a correct understanding of it.

In the history of human beings on Blue Planet, the first person who had a relatively correct understanding of gravity was Galileo.

More than 400 years ago, Galileo discovered that gravity has a particularly incredible property, that is, no matter what it is, heavy or light, or what material it is made of, it is subject to the same gravity. So he threw two iron balls, one big and one small, from the Tower of Pisa, and the two iron balls landed at the same time. But in fact, it is not known whether Galileo did this experiment. This incident was recorded by Galileo's student Vivani in Galileo's biography, but it was not recorded in any book written by Galileo himself.

So some people doubt that even if this experiment was done, it should not be done by Galileo, but no matter who did it, the fact is that it has nothing to do with the material, weight, or shape of the object. A speck of dust, a feather, an iron ball, no matter what it is, if there is no air resistance, they will all pay attention at the same time.

Although this phenomenon was discovered at the time, no one could give a reasonable explanation. Later, Newton explained this phenomenon through an apple. An apple fell on his head, and he suddenly realized that the apple was affected by the gravity of the blue planet.

Everything on the blue planet is subject to this gravity, and not only the blue planet, but everything in the world attracts each other. The blue planet attracts us, but we also attract each other, such as tables and chairs, and two people. So this force is called universal gravitation. Newton was very smart at the time. He thought of universal gravitation when an apple hit his head, and he believed that our blue planet could attract the moon because of this force. So Newton, like Einstein later, triggered a revolutionary change in cognition.

Before this, although naturalists on the blue planet knew that the blue planet might revolve around the sun, and the moon revolved around the blue planet, they did not know why the blue planet revolved around the sun, nor did they think that this had anything to do with the apple falling from the blue planet. However, Newton said that this was the law of gravity. Later, Newton gave the formula for calculating the law of gravity. Through the calculation of this formula, it was found that the motion trajectories of all celestial bodies completely conformed to the formula of the law of gravity.

All of a sudden, both gravity and Newton became famous, and everyone thought that Newton had solved the mystery of the universe because he knew why the planets were rotating. But later, due to the advancement of observation technology, astronomers discovered a celestial body that did not conform to the law of gravity, which was Mercury.

Through observation, it was found that the orbital period of Mercury was inconsistent with the orbital period calculated by universal gravitation, with a difference of about 50 seconds every hundred years. Although this error is not large, it cannot be eliminated no matter how it is observed or calculated, and it is also ruled out that this is an error caused by observation accuracy. Therefore, the universal gravitation that can explain the operation of all things in the world has been pulled down from the altar.

Then another thing happened that directly knocked down the law of gravity. Doesn’t the law of gravity say that all objects with mass will attract each other?

However, scientists on the Blue Planet have discovered that something without mass is also attracted by gravity, which is light. Light has no mass, but it will be pulled by the black hole, circling around it, and even falling into the black hole and unable to get out.

This is very strange, why would an object without mass be pulled by gravity! According to the law of gravity, if there is no such thing, there will be absolutely no gravity, and it will not be pulled, so gravity is completely invalid in this case.

Later this problem was solved by Einstein, whose understanding of gravity was completely different from Newton's.

First, Einstein overturned Newton's understanding of time and space. Newton believed that time and space were eternal, unchanging and absolute, but Einstein believed that time and space were soft and could be stretched or flattened.

Another very important point is that Einstein believed that speed and gravity are equivalent. For example, we humans need gravity to live a normal life, but there is no gravity in space, so people will float. If you want to live in space for a long time, you need a ring-shaped space capsule, rotate it, and rely on the centrifugal force to form an environment similar to gravity, so that people can live in it. This is using speed to replace gravity. The two are equivalent, and there is no difference in our perception.

Einstein said that the faster the speed, the slower the time. So why does the greater the mass, the slower the time? It is because gravity and time are equal, so the faster the speed, the greater the gravity, and the slower the time.

This is why time goes very slowly around a black hole. You don't need to know how fast you need to be around a black hole to maintain that position. You just need to know that it has gravity, and the closer you are to the black hole, the greater the gravity, and the slower time will be.

Einstein's theory perfectly explains why the orbital period of Mercury is different from the one calculated by gravity. Mercury is too close to the sun and is subject to a huge gravitational force from the sun, so the time on Mercury is very slow. We see Mercury moving slowly, but in fact it may be very fast, so the period we observe is different from the calculated period. After taking this time change into account, the result is the same.

Later, using the theory of relativity to recalculate the period of Mercury, it was found that it was the same as the actual observation result. Another point is that Einstein believed that gravity does not require both parties to have mass, because gravity is not gravity at all. Einstein believed that objects with mass will bend space, so objects close to this mass will enter an inclined plane and begin to rotate around it.

(End of this chapter)