When fully unfolded, it looks like huge wings spread out on both sides of the truck. There are tracks under the wings for automatic food delivery. There are tables and chairs on the bottom floor of the carriage, and the tables and chairs are connected by connecting rods through which they can be unfolded.
The upper level of the carriage is an automated kitchen. After the tables and chairs are unfolded, some of the equipment in the automated kitchen will be lowered to the carriage floor according to demand. Ye Feng and the others found a seat and sat down, ordering food on the electronic screen of the dining table.
During the meal, the holographic TV in the middle of the dining car broadcast the news of the successful launch of the Tianwen 19 detector. The launch of the detector was to detect a recently discovered neutron star fifty to one hundred light years away from the Panding star.
This launch is expected to bring the detector close to the neutron star in 476 years.
This neutron star is 53 light-years away from Panding Star at perigee and 78 light-years away from apogee. The emission window is once every 2,100 years, which means that if you miss this time, you will have to wait another 1,000 years.
.
The detector will approach the neutron star at perigee, and the approximate flight distance of the detector is about 53 light years. The neutron star is expected to be 5 to 6 times the mass of the sun, and the purpose of the detection is to confirm its trajectory. Because according to recent decades
Observations have found that this neutron star has been approaching the solar system. Once it approaches a certain distance, it will cause chaos in the motion trajectories of all celestial bodies in the solar system. The gravity may even cause the Panding star to gradually move away from the sun, and the temperature will drop, eventually causing the Panding star to no longer exist.
Suitable for human survival.
At this time, Wang Junfeng of One Hundred Thousand Whys said: "Brother Feng, what is a neutron star?"
Ye Feng said: "Neutron stars are considered to be planets composed of neutrons. However, this statement is actually wrong."
"Why?" Wang Junfeng asked.
Ye Feng then replied: "We must first understand the composition of matter. Neutrons are composed of two down quarks and one up quark. The atomic nucleus is composed of protons and neutrons. Protons are composed of two up quarks and one down quark. Neutron stars
It is due to the huge gravity of the neutron star that the electrons of all the materials above are pressed into the atomic nucleus, forming a high-density material. To put it simply, the neutron star is not composed of neutrons, but the atomic nucleus where the electrons are pressed into the atomic nucleus."
"If the nucleus is a ball with a diameter of two meters, then the electrons generally rotate more than a hundred kilometers away from the nucleus. Under normal circumstances, when the electron energy is exhausted, it will fall into the nucleus. If the electron is pressed into the nucleus by external force, the electron will
The process of approaching the atomic nucleus is a transition from a high energy level to a low energy level. Each transition will release ten photons. Don't think that this amount is small, you must know that the number of atomic nuclei is geometric."
"Because the neutron star is very dense, the large amount of light and energy released by the electrons are blocked, and only the more penetrating x-rays "escape". Therefore, when we observe the "absorption" of other materials by the neutron star, we can observe it through x-rays."
"Is a neutron star very dense? How big is it?" Wang Junfeng then asked.
"If the atomic nuclei are arranged closely, then the weight of one cubic centimeter of atomic nuclei is 100 million tons. And the density of a neutron star is also 100 million tons of one cubic centimeter." Ye Feng replied while drinking juice.
Ye Feng can't drink tea or coffee at night because he can't sleep at night, so he only drinks juice or milk.
"Oh my god! The density is so high." Wang Junfeng exclaimed.
"Will it turn into a black hole in the end?" Wang Junfeng asked again.
Ye Feng replied somewhat seriously: "Many theoretical physicists believe that black holes are formed when stars exhaust their energy and collapse. In fact, this is not accurate. There are many loopholes in this theory, and they have ignored a very basic issue."
"Let's first understand the so-called black hole. It is established based on Newton's law of universal gravitation and the theory of relativity that the ultimate speed of the universe is the speed of light. When a celestial body has an extremely high density and a small enough radius, its gravity will make it the first in the universe.
When the speed reaches the speed of light or exceeds the speed of light, simply speaking, any object will be unable to escape its gravitational constraints and fall into this celestial body, and this celestial body becomes a black hole."
Seeing everyone's confused expressions, Ye Feng continued to explain: "The first cosmic speed is the minimum speed required to escape the gravity of a celestial body. For example, the minimum speed required to escape the gravity of Panding Star is 7.9 kilometers per second. If an object moves at the speed of light
They cannot escape from this celestial body, which means that the first cosmic speed of this celestial body is at least greater than the speed of light."
Seeing everyone's sudden realization, Ye Feng continued: "If the gravity of a black hole can capture objects traveling at the speed of light, then the gravity generated during its formation will be enough to accelerate the objects attracted to it to super-light speeds. Then
Proving that the black hole theory is wrong.”
"In other words, based on the foundation of the black hole theory, we can prove that the black hole theory is a paradox as long as we prove that there is a possibility of super-light speed in the process of forming a black hole. Because the black hole theory is based on the fact that there are no objects in the universe that move faster than the speed of light.
This is contrary to it, which means that there is no black hole that has a mass so high that light cannot escape as traditionally believed.”
Wang Meng asked: "Didn't it mean that the free fall motion caused by gravity will eventually become uniform?"
Ye Feng replied: "That's on Panding Planet. There is an air environment, and the two forces are balanced by air resistance. Where is the resistance in space?"
Wang Junfeng chuckled and said: "Brother Wang, you must have fallen asleep in physics class at school."
Wang Meng rolled his eyes at him and said, "Tch, it seems like you know. You don't know even if you're not asleep."
Wang Meng asked unconvinced: "Can this kind of gravity accelerate to such a fast speed? Is the gravity so strong?"
Ye Feng took out his mobile phone and opened the calculator, and said helplessly: "We can do some rough calculations. Suppose a celestial body has a radius of 10 kilometers and a mass of A. An object is 10 kilometers away from the surface of the celestial body and is in free fall from a stationary state.
In fact, this distance is already very close. Such a massive celestial body would have a strong gravitational force tens of billions of kilometers away. Of course, we can prove that super-light speed can exist at such a short distance, which further explains the black hole theory itself.
has a problem."
"We first assume that an object is affected by the gravitational acceleration of the celestial body. When it falls on the surface of the celestial body, its speed is the speed of light, which is 3 times 10 to the power of 8 meters per second. According to the free fall formula, the square of the speed is equal to twice the gravitational acceleration times the height.
The gravitational acceleration on the celestial body is calculated to be 4.5 times 10 to the power of 12 meters per second." Ye Feng pressed the calculator on his phone as he spoke, and after completing the calculation, he showed everyone the calculation results.
Then he continued: "We have assumed that the radius of the celestial body is 10 kilometers. We can roughly calculate based on the formula that the mass of the celestial body is 6.75 times 10 to the power of 19 billion tons. The mass of a neutron star with a radius of 10 kilometers is approximately 4.187 times
10 to the power of 16 billion tons. This hypothetical celestial body is roughly equivalent to 1612 times the neutron star of the same volume. It is equivalent to 1.129 times the mass of Panding star times 10 to the power of 6, but the radius is 1/637 of the radius of Panding star
.”
"So the first cosmic speed of this celestial body is 262.8 kilometers per second. This is roughly equivalent to more than twice the fourth cosmic speed of 110~120 kilometers per second. This speed is far from the speed of light, so it cannot travel at the speed of light.
The object cannot escape. If the first cosmic speed of the celestial body is to be close to the speed of light."
"This requires its mass and density to be larger, and then there will be a problem. As we just calculated, the gravity of this celestial body is just enough to make the object fall on the celestial body, and the speed when it reaches its surface is the speed of light. If it increases
Its weight increases the gravity, and when the object does not reach the surface of the celestial body, its speed will be accelerated to super-light speed by the acceleration of gravity. Therefore, based on the above calculations, the black hole theory becomes a paradox."
"If there is super-light speed, then the black hole theory is not valid. Without super-light speed, black holes cannot be formed. Therefore, this kind of black hole that theoretical physicists believe does not exist."
Wang Junfeng continued: "Why can't it exceed the speed of light? I remember there is a superposition paradox of light speed. Can the speed of light exceed the speed of light through superposition?"
Ye Feng looked at the time, then drank the remaining juice and continued: "The inability to exceed the speed of light was proposed by Einstein. He believed that the speed of light is a constant. Regarding speed superposition, there was a problem in physics that the speed of light cannot be superimposed.
"
"We know that for example, a train is traveling at a speed of 100km/h. A person is traveling forward in the train at a speed of 1km/h. Then the person's speed is 101km/s. This is speed superposition. But we
On a train moving forward at a speed of 100km/s, if we turn on the light to shine forward or backward, the detected speed of light does not increase or decrease."
"The problem that the speed of light cannot be superimposed has always troubled human scientists. Until Einstein forcibly set the speed of light as a constant. Einstein believed that the speed of light is constant and unaffected. Einstein established the theory of relativity based on the constant speed of light. Later, Einstein established the theory of relativity based on the constant speed of light.
People then established quantum theory on this basis."