Space immigration agency

It has been 4.6 billion years since the birth of the earth. Originally, the earth is rich in natural resources, but with the continuous development of human beings, the demand for resources is increasing. Under the crazy exploitation of human beings, the earth's resources are no longer rich, or even in short supply.

Many scientists have said that the earth will not be suitable for human survival in the future. Hawking also said in the interview that the end of the earth will come one day. If human beings want to develop in the long run, they can only emigrate to outer space and live on other planets.

As we all know, the earth is one of the eight planets in the solar system and the only living planet in the solar system. According to the current ability of human beings, if you want to emigrate to outer space, you can only pin your hopes on seven planets except the earth. After all, human beings have only been to the moon, and we can't reach the speed of light, and even the solar system can't fly out. The hope of exploring exoplanets is also slim.

Therefore, Venus and Mars have become the targets for scientists to explore the second home of mankind, because Venus, Mars and the Earth are all located in the livable zone of the solar system, while other planets are far away from the livable zone and the environment is relatively harsh. So except Venus and Mars, other planets in the solar system were the first to be eliminated.

Venus, like the earth, is a terrestrial planet, and its mass is close to that of the earth, which is four-fifths of that of the earth. Venus has a radius of about 6,073 kilometers, only 300 kilometers smaller than radius of the earth, and its volume is 0.88 times that of the Earth. Therefore, Venus is also called the Earth's? Sister star? .

From these aspects alone, the conditions of Venus are still good, but through in-depth understanding of Venus, we will find that Venus is actually not suitable for life at all. Because Venus's atmosphere is mainly carbon dioxide and contains a small amount of nitrogen, its atmospheric pressure is 92 times that of the earth!

Moreover, the greenhouse effect of Venus is very serious, because there are many carbon dioxide gases in Venus' atmosphere. Under the action of the greenhouse effect, the surface temperature of Venus is extremely high. According to the data given by NASA, the surface temperature of Venus is about 464℃. Besides, Venus often suffers from acid rain, lightning and thunderstorms, which is hell for human beings, let alone living on Venus.

Venus is obviously not suitable for life. Scientists can only pin their hopes on Mars, which is a paradise compared with Venus. Although Mars is a desert planet with drought and water shortage, the environment of Mars and the earth is also very similar.

Mars has four distinct seasons, and its tilt angle and rotation period are similar to those of the Earth. The average daily average of Mars is 24 hours, 39 minutes and 35.244 seconds, and its geological activities are inactive, so its environment is relatively stable. While exploring Mars, the surgeon found that there was water on Mars.

In the polar regions of Mars, it is covered with solid carbon dioxide (dry ice). In the summer in the north, carbon dioxide is completely sublimated, and the rest is the ice water layer. 20 15 scientists say that there are not only water that has solidified into ice at the poles, but also liquid water that only appears and flows in warm seasons.

In 2008, the Phoenix Mars probe discovered the generation of water vapor when heating soil samples on Mars. Jim, head of the planetary science department of NASA? Green pointed out that a study on the atmosphere of Mars showed that almost the entire northern hemisphere of the earth was covered by water with a depth of about 1 mile in history. This study also found that until about1200 million years ago, there were still a lot of water bodies on the surface of Mars.

Agence France-Presse reported on 20 18 that the first liquid water lake was found on Mars. Besides? Curiosity? The Mars rover discovered an ancient freshwater lake that had already dried up on Mars, and found key life elements such as carbon, hydrogen, oxygen, sulfur and nitrogen. All these discoveries make scientists full of confidence in exploring life on Mars.

But so far, human beings have not found life on Mars, and it is still very difficult for human beings to move to Mars. Although human beings have made plans to move to Mars, it is more difficult than we thought, but space exploration technology companies are in full swing in the United States, hoping they can make a breakthrough.

The reason why human beings are so eager to move to outer space is mainly because the future development of the earth will be the same as that of Mars at present. With the global warming of the earth becoming more and more serious, the earth is getting hotter and hotter now, and many creatures are extinct because it is difficult to adapt to the earth environment.

The earth's ecosystem is also gradually collapsing, and it may be difficult for human beings to adapt to the earth's environment one day in the future, so human beings began to look for a second home so nervously. However, if human beings want to develop in the long run and not be eliminated by the earth's environment, they can only get rid of bad habits, protect the earth and improve the earth's environment. Only in this way can human beings live in harmony with nature. So what else do you want to say about this? Welcome everyone to leave a message in the comments section.