I believe friends all know that 65 million years ago was an era dominated by dinosaurs. At that time, dinosaurs were the overlord of the earth. They spread all over the world and were strong at the top of the food chain. Moreover, dinosaurs have existed for a very long time, reaching 160 million. According to the exploration of scientists, dinosaurs may have been born after the third mass extinction, and then experienced the fourth mass extinction, ushering in a period of strong development.
However, it was such a hegemon who ruled the earth 160 million years ago, but it died out 65 million years ago. There are many kinds of views about the extinction of dinosaurs in the scientific community. The mainstream view is that the asteroid hit the earth, about 65 million years ago, a small planet with a diameter of about 10 kilometers hit the earth, and the huge impact force drove the earth’s crust to vibrate, causing the eruption of global volcanoes Finally, the dinosaurs died out due to the food crisis.
At that time, not only dinosaurs died out, but also 80% of the creatures on the earth died out. This was the fifth mass extinction event in the history of the earth, which was brought about by an asteroid about 10 kilometers in diameter. It can be seen that the real threat to the earth is not the ecological environment of the earth itself, but the threat from outer space, among which the asteroid is the biggest.
Therefore, someone raised such a question: if an asteroid hits the earth again in the future, what will be the fate of mankind? How do we deal with asteroid impacts? Many people may think that the probability of an asteroid hitting the earth is too low to consider the threat of an asteroid at all. In fact, there are so many asteroids in the solar system that we are afraid of them.
There are many asteroids in the earth’s low earth orbit. There is an asteroid belt between Mars and Jupiter, with no less than 100000 asteroids. The Kuiper belt on the edge of the solar system encircles the whole solar system. The Kuiper belt is a ring of galaxies made up of all kinds of asteroids, and there are too many celestial bodies in it to be estimated. It can be seen that asteroids dominate the solar system in terms of the number of celestial bodies.
The earth is in the solar system surrounded by asteroids. Do you think you can avoid being hit by asteroids? For billions of years, the probability of the earth being hit by an asteroid is very low, mainly because there is Jupiter protection in front and the moon protection around. But even so, 65 million years ago, a relatively large asteroid broke through the blockade and hit the earth. For the earth, dozens of kilometers of asteroid impact will not bring devastating damage, but for earth life, that is a devastating disaster.
If another asteroid with a diameter of more than 10 kilometers collides with the earth in the future, the fate of human beings will mainly depend on the strength of human science and technology at that time. If it is at the present level of human science and technology, we can’t intercept asteroids with a diameter of more than 10 kilometers. If it happens, the only thing we can do is to sit at home and wait for the arrival of fate.
Some people may say that we can launch a nuclear bomb to blow up an asteroid. This kind of plot may be seen by many friends in some disastrous science fiction movies. In the movie, scientists use nuclear bombs to blow up asteroids and successfully make the earth avoid disaster. But in reality, it doesn’t work at all. If it’s a smaller asteroid, the use of nuclear weapons may have a certain effect. But if it’s an asteroid with a diameter of more than 10 kilometers, it doesn’t have much effect. At most, it will explode the asteroid, but it still can’t stop the devastating disaster brought by the asteroid.
Now scientists have been actively studying and exploring the technology of intercepting asteroids. The way that scientists have come up with is to use the spacecraft to impact with the asteroid head-on through the speed advantage of the spacecraft, and use the impact force to change the orbit of the asteroid, so as to let it pass the earth. This is a possible asteroid interception technology in the future.
To achieve this, first of all, human beings need to make a huge improvement in the power engine. If the spacecraft does not have an ultra fast impact, it is almost impossible to change the high-speed asteroid orbit. Secondly, the material of the spacecraft must be hard enough. Under the dual effect, it is possible to intercept a huge asteroid and change its orbit.
Therefore, in the future, the earth will face asteroids with a diameter of more than 10 kilometers, and the fate will depend entirely on the level of human science and technology at that time. If human science and technology had been qualitatively improved by that time, the speed of the spacecraft would have been able to fly at sub light speed, and the material aspect would have been substantially improved. At that time, intercepting an asteroid will no longer be a problem. For an asteroid that is tens of kilometers long, we can also change its orbit through the impact of a spacecraft.
Of course, if we leave enough time for human development, when we become a powerful interstellar civilization and have some powerful weapons, such as powerful laser weapons, antimatter cannons, etc., we don’t need to use impact to intercept asteroids at all, but we can destroy them with one shot. Therefore, the strength of human science and technology determines how we deal with the possible asteroid impact in the future.
Fortunately, the earth is protected by Jupiter and the moon. For a long time in the future, there will not be another asteroid impact like 65 million years ago. Therefore, the time left for us is still enough. As long as the strength of human civilization is strong enough, let alone asteroid impact, we can deal with any major cosmic disaster calmly.
We need to know that the universe is vast and vast. If human beings have the ability of interstellar navigation, the universe can be crisscrossed everywhere. We can also carry out interstellar migration and survive in other galaxies.
Guys, what do you think of this? Welcome to leave a message below to discuss and express your opinions.