"Okay." Qi Xinwu nodded in response, and then explained to the others, "The second video on the hard drive is the video taken by the near-moon space station when the asteroid hits the Earth, in this video we can see what will happen after the asteroid with a diameter of 500 kilometers hits the Earth from a macro perspective. I'll be playing at 32 times the speed, so please wear headphones and there will be subtitles at the bottom of the screen. ”

Yang Xiaoqian and Yu Qian glanced at each other, looked at the projection screen seriously and seriously, and inadvertently adjusted their sitting posture to be more upright.

The screen first showed a huge sphere hanging in the vast space, but the background was not as dark and lonely as imagined, but full of starlight, in addition to the companions in the solar system, there were a few colored lights in the distance to tear through the darkness, it was a nebula thousands of light years away, maybe there, there were, or there had been a variety of colorful creatures and civilizations.

An additional LED bar at the bottom of the screen shows the subtitle: Earth.

It turns out that this is the earth, not as beautiful as one might have imagined and depicted in various works, the supposedly blue ocean is gray like rotting seaweed, and the land is dark red and dark brown, and the shape of Mother Earth is not visible from the picture, but the subtitles under the projection screen and the electronic audio commentary from the headphones give more information.

Yang Xiaoqian also only now knew that the shape of the earth is not a regular sphere, and the astronomical telescope photos of the earth, the solar system, nebulae and other celestial images that he has seen before are actually photoshopped - of course, it is a reasonable image remodeling that strictly abides by the regulations, so that more people can enjoy it, otherwise most of the celestial images composed of invisible light will become monotonous and boring.

On the right side of the sphere representing the earth, there is a small gray-red sphere approaching the earth, that is, the asteroid that is about to destroy a civilization, and the behemoth with a diameter of 500 kilometers is placed next to the earth with a diameter of more than 12,000 kilometers, like a jujube core thrown at a basketball.

But theoretically, as long as this solid jujube core is fast enough, it can tear the basketball apart.

"Due to the difference in the texture of the asteroid, the mass of an asteroid with a diameter of 500 kilometers should be between 13 and 52 megatons, and the unit 'megabyte' is 100 million billion."

Even though the ending was already known, the audience couldn't help but gasp after seeing the astronomical numbers shown on the subtitles, worrying about the fate of another earth.

"When the asteroid is 200,000 to 300,000 kilometers away from the Earth, due to the existence of gravity, it will absorb a large amount of space dust and interfere with the orbit of the surrounding celestial bodies, and the Earth and the Moon will be affected, not only the orbit will change slightly, but also the rotation and revolution speed will change. Due to the complex gravitational complex, the Earth will experience phenomena such as tidal disturbances that will last for several hours. ”

Yang Xiaoqian listened carefully to the electronic sound coming out of the headphones, and did not drop a word. Judging from the distance between the Earth and the asteroid in the picture, it is obvious that it has passed that stage, and the approaching asteroid is affected by the gravitational pull of the Earth and pounces on the Earth like a moth to a fire, and there is no possibility of changing its flight trajectory.

When the asteroid is less than 100,000 kilometers away from the Earth, in the hemisphere facing the asteroid, people can see a shadow slowly moving by, obscuring the sky and the sun.

When the asteroid was 10,000 kilometers away from the Earth, a tsunami began to appear on the side it was facing, with waves ranging from a few meters to tens of meters, and the inland cities were still unharmed, while the coastal cities were washed away by the high waves of the mountains, and when a high mountain of sea water fell head-on, almost no people or buildings were spared.

The asteroid continues to accelerate and fall towards the Pacific Ocean, at this time it is at the boundary between the atmosphere and space more than 100 kilometers away from the Earth, and has not yet made contact with the Earth, but the low atmospheric pressure caused by its gravitational effect will cause the air above to rotate rapidly, forming a superstorm of proximity factors, which looks like an electric fan magnified countless times, twisting the center of the storm within a radius of 1,000 kilometers into powder, and the poor creatures in it, including humans, beasts, birds and plants, are all turned into fly ash under the shock wave, Annihilation in an instant.

The asteroid then enters the atmosphere, causing the atmosphere to rapidly change from low pressure to high pressure, and the storm suddenly reverses and spreads like ripples on the surface of the water, and this time, its speed will break through the speed of sound and ravage the area that the low-pressure hurricane has already swept through.

Finally, the asteroid collided with the earth, and in the huge range of hundreds of times the outward expansion of the contact side, the seawater evaporated, the material vaporized, the air was heated to a plasma state of more than 6,000 degrees Celsius, and the crustal lithosphere quickly dissolved and collapsed, and the 10,000-meter-thick crust and asteroid fragments will fly directly out of the surface of the earth and into space under the impact, forming the most brilliant fireworks. And this fireworks, the mass is at least more than 100 million tons.

The outermost shock wave of more than 3,000 degrees Celsius will propagate at hypersonic speed close to or even exceed the speed of the asteroid, and the shock wave will penetrate the mantle and reach the core of the earth, and the earth's core that creates the earth's magnetic field will be destroyed after the shock is affected, and the small wound on the earth's surface will rapidly expand and expand, from a point to a circle, and then with the shape of the earth into a curved arc, and finally cover the entire earth's surface.

As the ejection distance is extended, the wall begins to disintegrate from top to bottom, and the crustal material with blazing white light at the top begins to fall under the gravitational pull of the earth, and the debris that is ejected to the earth's low orbit descends directly to the surface after returning to the earth, turning into a mighty meteorite rain covering the hemisphere, which will completely destroy the earth's surface in an hour together with thousands of volcanoes that have sprung up like mushrooms after the rain. Turned into a sea of rippling lava fire.

The shock wave led the magma heat wave forward, vaporizing the liquid water in the earth's oceans and crust, burning everything it came into contact with into fly ashes, and after 24 hours, only a few human remains were able to preserve some remains, and there was no more than one square meter of inhabitable land on the earth's surface, but the inhabitants of the earth did not have to worry about displacement, because all life would evaporate in this extreme heat storm.

By the forty-eighth hour, the color of the earth's surface had changed from gray-blue to black-red, and in some areas golden threads were lit up, outlining the shapes of the continents, and the Pacific Ocean, where the impact was located, was still as golden as the sun, and from a distance, it looked like a huge burning briquette.