The birth of the earth was purely accidental. Can Mars be the second Earth?

Among the many celestial bodies in the known universe, the earth is a veritable "alternative". It is a rocky planet with water, oxygen, magnetic field and suitable temperature, all of which are necessary conditions for the existence of life.

Of course, the size of the earth is moderate, the gravity is moderate, the distance from the sun is moderate, the position is moderate, and the speed of revolution and rotation is moderate, so this colorful world is produced.

It can be said that it is an absolute coincidence that the planet earth can be born in the universe, and the earth can give birth to life, which is even more a coincidence in coincidence. It takes countless conditions to get together. For example, the possibility of the earth being born in the solar system is less than the possibility of winning the lottery. In other words, you throw a needle into the Pacific Ocean, and it happens that a thread at the bottom of the sea passes through the eye of the needle. What a coincidence.

Why do you say that? Look, human beings have been exploring the universe for thousands of years, and the development of science is changing with each passing day. The development of astronomy is higher. I discovered so many celestial bodies and visited so many planets. Various detectors emerge one after another. Voyager 1 has flown out of the outer solar system, and the range of human observation of the universe has reached 93 billion light years. Can you find the second earth? Don't! We often talk about aliens and flying saucers, but who has seen them? But this is just a rumor.

It can be said rudely that the earth is the only one in the universe, at least the only one in the galaxy! And life is a rare thing. Looking at the whole space, life is precious.

We live on the earth, and every day, we are bustling, jostling, stumbling, daily necessities, joys and sorrows and always telling wonderful stories. But in fact, the earth is lonely and life is even more lonely. The earth looks big because human beings are short-sighted and have limited cognition. In fact, the earth is very small, not only the earth is very small, but also the solar system is insignificant, and even the whole galaxy is like a dust.

In a word, we should cherish life, cherish the earth and protect our home.

Do you think the universe will last forever? Will time last forever? No! Everything in the universe, including the universe itself, has life! The age of the universe is 65.438+0.37 billion years old, and it is still expanding, but this does not mean that the universe can live forever. In the future, maybe 65.438+0 billion years later, the universe will inevitably die, whether it is collapse or thermal death, the life of the universe will eventually come to an end.

As a yellow dwarf, the life span of the sun is 100 years. At present, the sun is in middle age, and it has a life span of 5 billion years. At that time, when the sun's energy is exhausted, it will expand into a red giant, its brightness will suddenly increase to more than 2,000 times, and then it will gradually cool down and collapse into a white dwarf. Both light and heat will disappear, and the sun will become an ordinary star in space. At that time, even if the earth can escape the fate of being swallowed up, it will slowly die out because of losing the light and heat of the sun.

Actually, no one else should be blamed. This is the only way for the evolution of the universe. No one can escape, just like human beings, no matter how rich or poor, they will eventually die! As a star, the sun can't escape bad luck, but the earth is just a planet, and its fate can't stand the wind and waves. At present, the earth is 4.6 billion years old, with a life span of up to 5 billion years. Five billion years is a long time for us, but it is a glimpse, that is, an instant, for the history of the whole universe.

So, when that day comes, can human beings save themselves?

The film The Wandering Earth speaks well, but this is a film and a novel. In fact, as long as the sun disappears, the life of the earth will be over. In fact, maybe we can't wait for the sun to die at all, and the earth has already died! Due to human intervention, the earth is no longer a primitive planet, and many risks are unpredictable. Doesn't this mean that Mars is the home of the future? This is just a hypothesis. Whether humans can immigrate to Mars in the future is still an unknown number full of variables. But it is undeniable that when the earth is no longer suitable for living in the future, emigrating to Mars will be one of the few choices.

Why do you say that?

Mars is located outside the earth. It is the second closest place to the earth. Isn't Venus closer to the earth? Hehe ... Venus and Mercury inside the earth, let's not disturb them, they can't sustain life at all. The temperature of more than 400 degrees Celsius, the ultra-high atmospheric pressure, the relentless sulfuric acid rain, the exposed environment without magnetic field protection, and the temperature difference of-190 at night are all fatal in minutes. The most important thing is that they don't have oxygen and water to live on. How do they breathe? How to make a living?

Mercury is not worthy of its name, it doesn't have a drop of water! It is the closest celestial body to the sun, averaging about 50 million kilometers, slightly larger than the moon, with a diameter of 4,880 kilometers and a density of 5.4 grams per cubic centimeter, second only to the earth. It has a surface area of 75 million square kilometers, which is about equivalent to two Asia, a volume of 60 billion cubic kilometers and a weight of 33 trillion tons.

Mercury's revolution speed is extremely fast, the speed of 47362 kilometers per second is the highest in the solar system! Think about it, the revolution speed of the earth is only 29 kilometers per second, and mercury runs so fast that it doesn't make people dizzy! However, the rotation speed of Mercury is extremely slow. It only takes 58 days to make a circle, and it is only more than 3 meters per second, which is not as fast as a bicycle. These are not the most critical. The problem is that Mercury has no water, no atmosphere, weak magnetic field and no substitute. And because it is too close to the sun, mercury is difficult to be observed. Astronomer Copernicus once lamented that he had never seen Mercury in his life.

Venus is closest to the earth. It is the sister star of the earth! Venus is very similar to the earth in terms of size, density, specific gravity and weight. In addition, it has a thick atmosphere, 224 days in period of revolution, slightly faster than 365 days on Earth. Please look at the following data:

Venus has a diameter of 12 103 km, which is only a little smaller than the earth. It has a surface area of 460 million square kilometers (5 1 100 million square kilometers on earth), a weight of 49 trillion tons (6 trillion tons on earth) and a volume of 950 billion cubic kilometers (1 trillion cubic kilometers on earth).

However, the environment on Venus is extremely bad. It is the only celestial body in the solar system without a magnetic field. The high temperature of 460 is easy to melt tin.

Due to the greenhouse effect, there is almost no temperature difference on Venus, and it is as hot as day and night! Venus has an atmosphere, but it is all carbon dioxide, and its rotation is very slow, only 1.8 meters per second, which is not as fast as human walking.

The days on Venus are getting longer and longer. There is no temperature difference among seasons, days and nights and regions on Venus. It is hot everywhere, day and night, spring, summer, autumn and winter! Venus, in turn, the sun rises in the west and sets in the east.

There is a 30-kilometer-thick sulfuric acid cloud in the atmosphere of Venus, which often rains with sulfuric acid and thunders. In addition, the atmospheric pressure on Venus is 92 times that of the earth, which is very scary. So Venus is the least suitable for life, and even a bacterium can't survive on Venus.

What about Mars? Can Mars be the next Earth in the future?

The answer is yes! Mars will be the second earth in 100 million years! In fact, Venus was as prosperous as the earth 1 100 million years ago, but time has passed. With the gradual enhancement of the sun's rays, the energy it radiates is getting bigger and bigger, and the temperature on Venus is also increasing day by day, and it has gradually become what it is today!

Therefore, Venus is the former Earth and Mars is the future Earth. At present, the sun is in the main sequence star stage, its light and heat are still increasing, and the temperatures of the planets in the solar system are also increasing. About 100 million years later, the earth became unbearably hot and life gradually disappeared, just like the ancient dinosaurs disappeared. When the earth becomes like Venus, will there be life?

Therefore, Mars is the home of the future. Through long-term observation, scientists found that the temperature of Mars is rising. The future will become as livable as today's earth, the thin atmosphere will become thicker, and life will appear on Mars. This is also the reason why countries are scrambling to explore Mars in recent years.

However, Mars is a little small. By then, the whole world will emigrate to Mars. I wonder if it is suitable for Mars?