The moment Chen Yu stepped out of the Interstellar Portal, a gravitational force that he could not detect, yet was real, dragged him forward.
However, as soon as Chen Yu activated the quantum engine, the pulling force was immediately offset.
"According to the data displayed in the helmet, my current speed is 1,020 meters per second. A black hole 7,000 kilometers away won't pose a threat to me at all.
Moreover, the engine's pressure is only at 75% right now. In other words, I can easily escape even if I go further.
"However, for safety's sake, let's set this limit. I can't go too far."
After saying so, Chen Yu increased the engine's pressure by 10% and flew in a certain direction at a slow speed.
"Logically speaking, a black hole without an accretion disk is indeed invisible.
However, I have a method that can let everyone observe the existence of a black hole with their own eyes.
"However, this method requires finding a special angle.
"In that case, before looking for this angle, let's take this opportunity to explain to the viewers who don't understand astronomy what a black hole is."
Facing the camera, Chen Yu recalled the script he had memorized in advance and slowly said, "To put it simply, a black hole is the product of a mass of matter being compressed to the extreme.
"If a cat is squeezed through a hydraulic press, it will become very thin.
If there is a magical hydraulic press that can compress this cat to a few nanometers, then every molecule in its hair, flesh, bones, and nerves will be crushed into neutrons, and then the neutrons will be crushed into atoms, and finally, all the atoms will be crushed … "
"None of the atoms that make up this cat exist, but its weight still remains.
"Hence, this cat will become a black hole with infinite mass."
[Cat: Meow?]
[What a scary metaphor.]
[So easy to understand.]
[Husband is so knowledgeable!]
[Husband is so knowledgeable!]
[Really knowledgeable + 1]
[I understand the logic, but where can I buy this hydraulic press?]
[Have you guys forgotten that the theme of this livestream is a human disaster?]
[I haven't forgotten, but I just want to type 666...]
[666...]
Since his hands were covered by the protective armor, Chen Yu couldn't see the audience's bullet comments and continued his explanation.
"Of course, it is impossible for a cat to collapse into a black hole.
In the universe, only stars, such as the sun, can collapse into a black hole. "
"If our sun is dozens of times larger and becomes a super large star, when its internal nuclear fusion fuel is exhausted, its huge outer shell will collapse inward. Under the pull of gravity, molecules, neutrons, atoms will be crushed … Finally, it will become a black hole."
"This is the origin of most of the black holes in the universe."
Pausing for a moment, Chen Yu waited for the audience to digest his words. He then continued, "Many people will be wondering how humans managed to discover such a thing.
I have to mention one of the two thighs of human civilization — Einstein. "
"In 1916, Einstein officially published the Theory of Relativity, and the whole world knelt down in worship.
At this time, the astronomer Schwarzschild, with the theory of relativity, calculated the gravitational field equation and came up with a "vacuum solution."
This solution showed that if a large amount of matter was gathered at a point, there would be a visible interface around this point.
Once it enters the visual plane, nothing can escape, including light. "
"The inconceivable celestial bodies in this theory are called black holes by the physicist Wheeler."
"Its existence was completely beyond the understanding of the academic community at that time. Many scholars were unwilling to believe it.
However, Einstein's general theory of relativity had been verified.
Unless the theory of relativity is wrong, black holes must exist. "
"Everyone knows what happened after that."
Giving a thumbs up, Chen Yu said, "Through gravitational redshift and gravitational lensing, we proved that black holes exist."
【666！】
[Awesome...]
[You're too young to work hard.]
[This is an eye-opener.]
[Daddy Einstein's thighs sure are thick.]
[What's that white hole?]
[A white hole needs to be made by hand. A bottle of hair removal cream and a razor are enough.]
[(; ¬ _ ¬)]
[Old driver, take me with you. I want to go to the provincial capital...]
"Black holes are scary."
Glancing at the changes in the gravitational field displayed on his helmet, Chen Yu said solemnly, "So long as you enter that visual plane, you will be torn apart by the terrifying gravitational force.
Not even Ant-Man can withstand it.
"Hmm... That's all I have to say about the origin and history of black holes.
I'm already not far away from that 'point.'
Let's take advantage of the remaining time to tell everyone something interesting.
"Black holes only have three basic quantities.
Mass, angular momentum, and electric charge.
Mass is weight, angular momentum is rotation, and electric charge is whether a black hole is charged or not.
"Hence, in academia, referring to these three basic quantities, black holes will be divided into four types according to whether they are rotating or not, using the Cartesian product method: Schwarzschild black holes, R-N black holes, Kerr black holes, and Coleman – Newman black holes.
"However, this type of classification is too technical, and a portion of the audience won't understand it. Hence, I will use the perspective of an ordinary person and classify black holes based on their size.
After saying so, Chen Yu stretched out three fingers toward the camera.
"Small black holes, stellar-level black holes, and supermassive black holes!
"Let's talk about supermassive black holes first. Their mass is beyond imagination, and they can even drive the rotation of an entire galaxy.
For example, the Sagittarius A black hole at the center of the Milky Way has a mass of 4.3 million times that of the sun!
"The Andromeda Galaxy next to the Milky Way has a mass of 33 million times that of the sun!
"The Sombrero Galaxy's central black hole has a mass of 1.02 billion times that of the sun!
"The black hole at the center of the Black Hole 7 we saw in photos last year has a mass of 6.5 billion times that of the sun.
“ton
That's 66.6 billion times the sun's mass. Just the diameter of the Schwarzschild black hole alone is 384 billion kilometers... "
After saying so, Chen Yu couldn't help but sigh. "This is the universe. The more I understand it, the more I realize how insignificant I am.
"As for the stellar-level black holes, they are the ones I mentioned before. Black holes formed from the collapse of stars generally have a mass of several dozen times that of the sun.
Skip it.
"Meanwhile, the black hole our solar system has encountered is a small primordial black hole.
Its mass is only 125 times that of Earth, and it was formed during the Big Bang when matter was extremely dense.
"According to Hawking's radiation theory, a formed black hole will slowly radiate particles outward.
If the black hole doesn't eat, the black hole will evaporate, leaving behind only a permanent, Prandt-length remnant.
However, this process is quite long.
"In other words, the hole that is 7,000 kilometers away from me is already 13.7 billion years old.
It has witnessed the moment of the Big Bang. "
[Shocking...]
[Compared to the universe, Earth is like a bacterium.]
[The ancients thought the universe revolved around Earth, lololol.]
[You've been following the host since the first livestream. You know a lot!
Admirable!
Awesome!]
[Awesome my ass!
Don't you know what a script is?]
[OMG!
The host doesn't have a script, so he's awesome!]
[The host is awesome!]
[Awesome + 1]
[Do you know how hard our host works?]
[I can't tell if he's a hater or a fan...]
"We're here."
After flying for another five minutes, Chen Yu suddenly came to a stop. He then spread his arms and said, "This is the place.
"As we all know, even light cannot escape the gravitational pull of a black hole.
However, what about light that approaches the black hole's event horizon?
"It will be distorted.
"This phenomenon is called gravitational lensing.
"Let's make a bold assumption, then...
"If we look at the sun through a black hole... what will happen?"
Clasping his hands together, Chen Yu's tone gradually became excited. "The light in the middle will disappear, and the light in the four rings will be distorted.
This way, we can see the existence of a black hole with our own eyes through the distortion of light!
"The gravitational pull that can absorb light particles just happens to be the culprit that exposed the black hole!"
[Crap?!]
[That makes sense...]
[That's the legendary Einstein ring!]
[God's train of thought...]
[This is crazy.]
[Awesome! Awesome!]
[Mom asked me why I'm doing somersaults to watch the video.]
[This operation is really cool...]
[Cool.]
[And here I was wondering how I could see it. So that's how it is...]
"Meanwhile, my current position is on a straight line between the black hole and the sun.
"Now, counting down from three seconds..."
Slowly adjusting the camera, Chen Yu said, "Let us witness the true form of the black hole together!
"Three.
"Two.
"One!"