Kunlun Station's main body was a white hard shell, like a big bowl that was upside down on the surface of Mars. The main material of the shell was glass fiber reinforced PEEK plastic, also known as polyether ether ketone. It was an aromatic, crystallized, thermoplastic polymer material that was widely used in aerospace engineering. It had high strength and high abrasion resistance, and it could be used normally in temperatures ranging from minus 250 to 300 degrees Celsius.
Tang Yue walked on the sand and carefully inspected Kunlun Station. There could not be any problems with the main station's airtightness. The atmospheric pressure on Mars was only 700 Pa, less than one percent of Earth's. Kunlun Station maintained a standard atmospheric pressure of 101 kPa. If there was a crack in the main station's shell, then the entire station could explode like a punctured balloon.
The weather was good today, and the sun was high above his head.
Tang Yue stroked the smooth outer wall of Kunlun Station. The white outer wall was nearly three meters high, and it was firmly fixed to the ground with straight steel cables.
"Old Cat, I have a question for you."
"Hmm?" Old Cat's voice came from the earpiece. "What is it?"
"Under what circumstances would Earth explode?" Tang Yue asked.
"Under no circumstances would Earth explode," Old Cat answered.
"Then why did Earth disappear?"
"How would I know why it disappeared?
No matter how it disappeared, it couldn't have been blown up. "
Old Cat shrugged. "If Earth was really blown up, do you know how much energy it would take to blow up Earth?"
"How much?"
Tang Yue reached out and pulled the steel cables. Kunlun Station had six fixed steel cables. One end was hung on the outer wall, and the other end was nailed deep into the ground with long nails.
"We can do a simple calculation. Earth's average radius is 6,370 kilometers, and its equatorial circumference is 40,000 kilometers. According to the calculation formula of the volume of a sphere, V = 43πR ∧ 3, Earth's volume is about 1.08 × 10 ∧ 12 cubic kilometers," Old Cat said.
"The Earth's gravitational acceleration is 9.8ms ² 2. According to the mg = GMmR ² 2 that you learned in high school, as well as the circular motion formula, the Earth's density can be estimated to be 5.5 × 10 ² 3 kilograms per cubic meter. In other words, it's a little more than five times denser than water."
Old Cat continued, "So Earth's mass is about 5.97 × 10 ∧ 24 kilograms."
"Which is 5970000000000000000000 tons."
Tang Yue did not hear how many zeros Old Cat said. His mind was full of zeros.
"We can define 'blowing up Earth' as' accelerating all matter on Earth to the first cosmic speed and breaking free from the shackles of Earth's gravity. 'That is, reaching a speed of 7.9 kilometers per second. According to the formula of conservation of kinetic energy, we can calculate that to do this, we need at least 2.24 × 10 ∧ 32 Joules of energy."
"Which is 224000000000000000000000000000000 Joules."
Tang Yue was speechless.
"The atomic bomb that flattened Hiroshima released about 5.5 × 10 ∧ 13 Joules of energy. That is to say, if you want to blow up Earth, you need 4 × 10 ∧ 18 Little Boy atomic bombs."
Old Cat finally gave the result. "This is equivalent to 6.5 billion people in the world, each carrying six hundred million nuclear bombs. Then, everyone buries the nuclear bombs deep underground and detonates them at the same time to blow up Earth."
"Even if humans were given another ten thousand years, they would not be able to create so many nuclear bombs."
Tang Yue was speechless.
"Taking a hundred million steps back, if someone could really blow up Earth, then hundreds of millions of rock fragments would spread throughout the entire orbit, forming an asteroid belt, or recombining under the influence of gravity to form a planet."
Old Cat said, "But as far as the current observation results are concerned, none of the above signs have happened. Earth has simply disappeared without leaving behind any debris … This is obviously not a bombing."
"Then what's going on?"
Old Cat paused and hesitated for a few seconds.
"It's more like Earth has been directly erased, as if it was wiped clean with an eraser. As far as I know, the only thing that can cause such a result is a miniature black hole that fell into Earth," Old Cat said.
"What what?" Tang Yue was shocked. "Black hole?"
"A miniature black hole, such as a black hole the size of a proton."
Old Cat explained, "If you leave such a tiny black hole alone, then it will quickly evaporate and disappear. But if you throw it on Earth, then it will continue to absorb the Earth's matter and sink into the core of the Earth. After absorbing the Earth's mass, the mass of this black hole will gradually increase and become more stable."
"This method is cleaner and won't blow up debris everywhere."
"The problem is, where did the black hole come from?" Tang Yue frowned. "Could it be that the group of people in Europe who did high-energy physics made a mistake?
Using the LHC to create a black hole? "
"I didn't say that the disappearance of Earth must be caused by a black hole. Don't be so anxious to accuse others. The LHC can't create a black hole."
Old Cat shook its head. "The Earth has such a large mass, but it can disappear into thin air without a sound. This obviously violates the law of conservation of mass. According to the physics we currently grasp, the only possible reason is a black hole … because the event horizon of a black hole does not follow all the known laws of physics."
"But a black hole is actually wrong. If the Earth was really sucked in by a black hole, then in a short period of time, a huge amount of mass would be converted into energy and radiated out. In our eyes, the Earth may become as bright as the sun in a short period of time." Old Cat thought about it and rejected the black hole conjecture.
"A black hole is also wrong. Then what should be the reason?"
"I don't know. Maybe it's because of some natural phenomenon beyond our understanding, such as a large filter that we have never heard of before," Old Cat said. "It could also be the doing of an intelligent civilization beyond our understanding."
Aliens?
Tang Yue was stunned.
Aliens erased the Earth?
If it were any other time, Tang Yue would definitely think that Old Cat was talking nonsense. As a materialist atheist who grew up under the red flag, how could he believe in these illusory things?
But Tang Yue now had to accept this statement. The Earth was gone, and the most unimaginable thing had happened. What else was impossible?
Maybe it was really the doing of a god-level civilization that was far beyond human imagination?
A certain god-like thing, sitting high above the Milky Way, accidentally farted.
Oh, no, I ate something bad last night.
God thought silently, and then quietly looked around.
Hmm … Everything in the Milky Way is normal. Fortunately, no one found out that I farted, and it didn't cause any damage. I continued to sit upright and pretended to be cold.
The Earth was gone just like that.
People were sitting at home, but farts came from the sky.
"Alien bastards!" Tang Yue roared to the sky. "F * ck you!"