Successful explanations are easy to understand, and a layman like Haige can understand them as soon as he hears them. "But obviously, this equilibrium is not eternal, so what is the reason why the gravitational equilibrium between the sun and the earth is broken, and the earth is about to be destroyed because of the sun?" ”

"According to the analysis of Newton's first law, founded by a physicist named Newton on your earth, when the force and velocity of two moving objects are in equilibrium, they will be in a uniform linear motion or a relatively stationary state, and if there is no external force, the state will not change." This relatively static equilibrium ensures that they are safely maintained as they are. But the relative stationary movement of the Sun and the Earth occurs in the universe and is extremely unstable, and when deviations occur, the Earth may deviate from its normal orbit. There are two possibilities for this deviation: one is that the mass of the Sun or the Earth itself changes, causing the Earth to deviate from its original orbit. Second, if there is an external force acting on the earth, and the external force is greater than the mass of the earth, the earth will be pushed away from its original orbit. What would happen if a large ship sailing in the sea tilted? The people on board fell overboard, and finally the ship capsized, causing a shipwreck. The consequences of the tilt of the earth are the same as those of large ships, but the difference is that earthlings may fall to their deaths without weight. Therefore, maintaining the balance of gravity between the two celestial bodies is the basic condition for their survival, and once this condition is lost, disaster will befall. ”

"I understand, I understand why you compare gravity to the maintenance of cosmic order! It doesn't let the celestial bodies in the universe run around, so it causes traffic accidents! Hai Ge knew that this statement was naïve, but she still couldn't help but say it.

Chenggong smiled slightly and replied, "If you find it convenient to describe Mr. like this, of course I don't mind." But don't get me wrong, it's a deliberate exaggeration of the role of gravity to blame the Earth's stagnation. ”

"If it's not it, who will be the culprit? Who is going to kill the sun that protects the earth? Hai Ge became impatient again, he really wished that the sun was still the same as a billion years ago, a healthy yellow dwarf.

The success of few emotional fluctuations actually let out a soft sigh, "The nuclear fusion energy of the sun is constant, even on the Wedel-U star, which has a far higher degree of scientific development than the earth, it is estimated that no scientist can create a weapon or find a way to easily destroy a star similar to the sun, but this golden beauty who seems to be invincible in the universe is no match for a special celestial body - a black hole." ”

"Black holes?" It's a new term, and Hai Ge feels both oppressive and terrifying to hear, "Do you mean a dark cave?" If the Sun is a star, with a constant position in the universe, how can it run around, pass through a black hole and fall into it? ”

Chenggong shrugged his shoulders and replied: "The statement 'impossible' does not exist in the universe, and the fact that it does not happen does not mean that it will not happen, and once the conditions are met, any hypothesis will become true." My hypothesis is that what if the sun doesn't need to move, that a black hole forms below it, and comes to provoke it? ”

Hai Ge shuddered, waiting to figure out who the monster called "Black Hole" was.

Success went on to say: "Compared to the Milky Way, the solar system is still just a child. Outside the solar system, a large number of stars begin to collapse after depleting their hydrogen-based nuclear fuel, and eventually age and die. Dead stars may become white dwarfs, neutron stars, or black holes, the most mysterious, unknown, and terrifying ultimate state in the universe that we currently know.

"Wedel-U, once a brighter and larger star than the Sun, but because it is more massive than the Sun, it prematurely consumed the hydrogen fuel in its core, expanded into a red giant during helium fusion, and exploded into a helium flash. The death of the U star can only be described as a blessing and a curse. In the process of dying, it throws a brilliant nebula, and the dense part of the nebula collapses to form a new celestial body, the Sun. After a long evolution, the solar system was born, and what is the final fate of the mother of the sun, the Wedel-U star? It is faced with two choices: one is that the red giant star expands to the maximum extent and then gravitationally collapses, and finally becomes a neutron star, which is not harmful to the sun. Unfortunately, perhaps because the U star is too massive, it made the second choice, which is to form a black hole with a super gravitational field and deflection of light in the gravitational collapse. ”

"Below the sun, a black hole appeared? Could it be that the gravitational field emitted by this black hole is stronger than the gravitational pull of the sun or the earth itself? Haige asked in shock. He gradually began to understand the relationship between Wedel-U and the Sun and the Earth, and this can also be explained, saying that there are important things related to the fate of the Earth to tell him, why did Wedel appear on Earth?

But the success explained very clearly, that planet was destroyed a billion years ago, how could anyone still be alive and break into the earth? Of course, it is reasonable for paramagnetic nanobots that will not die easily to stand in front of them.

Chenggong couldn't see what Hai Ge was thinking, and said to himself: "The black hole can be called a cosmic tomb, it not only disrupts time, but also changes the path of light in time and space, imprisoning them so that they can no longer escape. The black hole is in a state of perpetual starvation, constantly sucking nearby celestial bodies into its gravitational field, and constantly being joined by dying stars, causing its density to continue to increase, and its mass to continue to increase, and gradually, it becomes a threat to the still healthy celestial bodies, such as the sun. ”

I think that's because," Hai Ge "grunted" swallowed a mouthful of saliva and timidly said his analysis: "It's because the sun has to release more heat energy in order to resist the gravitational pull of the black hole and not swallow the troll in its stomach." To obtain thermal energy, it is necessary to burn the fuel, which is the hydrogen at its core, which leads to a much shorter life and a change in quality. Therefore, the culprit of the destruction of the earth is not actually the sun, but the ...... located below it Wedel-U star? ”

Successfully maintaining the current brisk tone, he finally changed, and he said sadly: "Please accept my sincere apology." Our universe is ever-changing, and no matter what level of civilization it has developed, it is not capable of being the master of the universe and using boundless power to decide the life and death of a planet. I hope you don't see people from Wedel-U as enemies, and I'm sure Mr. Weddle is willing to help you. ”