What is the 84% "super earth" similar to the earth? 22 light years away from the earth, can you move?

20 13 On June 25th, an astronomical hobby research group of the University of G? ttingen in Germany announced that they had discovered a super earth in the distant universe, which was located in the livable zone around a star. This means that there really exists a planet similar to Earth in the universe, and it is very likely that human beings will migrate in the future.

What is a super earth? What is the significance of discovering super earth for human beings?

Super earth, also known as super earth-like planets, refers to those planets in the universe that are highly similar to the earth, especially those with similar plate structures. The earth is the only known plate structure planet. Scientists believe that plate movement is a necessary condition for the evolution and development of life. Therefore, according to this standard, the super earth must have the same plate structure as the earth, such as craters, volcanoes and canyons.

Since exploring the universe, scientists have discovered thousands of earth-like planets. Mercury, Venus and Mars in the solar system are the three closest terrestrial planets to us. But terrestrial planets are only similar to the earth in some places, and there are few terrestrial planets with high similarity. The planet discovered by the astronomy hobby group of the University of G? ttingen perfectly meets all the conditions of the super earth, and it can be said that it is the most similar planet to the earth so far. It's Gliese 667Cc.

Gliese 667C is a star in a Trinary star system. This three-star system is a very rare galaxy with three stars at the same time. The names of these three stars are Gliese 667A, Gliese 667B and Gliese 667C. Every star has its own livable zone, and several planets revolve around them. Gliese 667Cc is a planet in the livable zone of Gliese 667C, 22 light years away from the Earth, and its similarity with the Earth is as high as 84%.

According to the observation results of the European Southern Observatory, besides 667Cc, there are two planets located in the livable zone, but they can't be called super earth because some data can't meet the conditions of super earth.

In addition to Gliese 667Cc, there are many super earths in the universe.

In 2005, scientists discovered a planet orbiting Gliese 876, whose mass is 7.5 times that of the Earth. This is the first super earth discovered, which opens the way for mankind to find another earth. In 20 10, scientists discovered gliese 58 1g, a rocky planet with an atmosphere and liquid water on its surface. Its mass is about 3. 1 times that of the earth, and its gravity is very close to that of the earth. In addition, there are other exoplanets such as Kepler 452b and Kepler 22b, which are called "big cousins of the earth".

How was Gliese 667Cc rated as Super Earth?

The first necessary condition to become a super earth is that this planet must be a rocky planet.

Because only rocky planets can undertake human activities on the ground, such as gaseous planets like Uranus and Neptune, without solid land, human beings can only float in mid-air, which is unrealistic. Scientists divide terrestrial planets into two types according to rock types, one is mainly composed of silicon compounds, and the other is mainly composed of carbon compounds. Planets like the earth are mainly carbon compounds, and life on the earth is also carbon-based life.

Through observation, scientists found that Gliese 667Cc is probably a rocky planet, and its interior is composed of rocks, which laid a material foundation for the survival of life.

The second is to have an atmosphere suitable for life.

The atmosphere is very important to life. The atmosphere on the earth blocks the radiation from the universe for human beings, and builds a protective layer for the earth, so that the temperature of the earth is kept within a range, so as not to fluctuate greatly. The most important thing is to provide oxygen for life. Without oxygen, you can't breathe and life can't go on.

Astronomers have observed through telescopes that Gliese 667Cc has a thick atmosphere on its surface, which makes it possible for this planet to have a constant temperature and not be disturbed by cosmic radiation.

In addition, there is a necessary condition, that is, water.

Water is the source of human life and an important part of cell protoplasm. In the latest issue of the Journal of Astrophysics, it is clearly pointed out that according to the distance between Gliese 667Cc and its star Gliese 667C, there is a great possibility of liquid water on this super earth, and its atmosphere may contain rich water vapor, so life can continue with water.

In addition, several more important factors are the mass and volume of the planet itself.

The mass of Gliese 667Cc is 4.5 times that of the earth, and its surface area is much larger than that of the earth, so it is completely suitable for human habitation. Moreover, Gliese 667Cc has been produced for a long time, and its resources will be relatively richer than the earth.

Based on all the observation data, scientists have come to the conclusion that Gliese 667Cc is as similar to the Earth as 84%, and it is the "Earth" in the Earth, only 22 light years away from the Earth, and it is a planet worthy of human exploration. However, it is worth noting that the distance between 667Cc and its star 667C is closer than the distance between the earth and the sun, so it receives more light and heat than the earth, and the temperature is naturally slightly higher than the earth. Assuming that the atmospheric composition of Gliese 667Cc is similar to that of the earth, its surface temperature will be around 60 degrees Celsius.

Since Gliese 667Cc is so similar to the Earth, can it be migrated?

Planet migration is a beautiful vision that human beings have had since the beginning of exploring the universe. People have always thought that there are countless planets like the earth in the universe suitable for human habitation. With the wanton plunder of the earth by human beings, the earth is now overwhelmed, so some scientists began to advocate planetary migration.

20 1 1,/On June 3rd, 2008, Cosmology magazine of the United States published an article entitled "Migration to Mars" for the first time, saying that it was hoped that human beings would immigrate to Mars privately in 20 years. The publication of this article aroused the interest of those who are interested in the universe and paid a lot of money to sign up. But this is a one-way trip, and it is a difficult choice for most people to be prepared never to return to the earth. After all, no one is a mouse and wants to be an experiment. Therefore, the current Mars immigration plan is still in its infancy, and human beings do not have the strength to achieve immigration.

However, it has also been pointed out that the Mars immigration plan is just a scam to cheat money.

First of all, it takes seven months to reach Mars from the Earth, which is too long, and the variables in the middle are also great. In addition to the fuel of the rocket itself and the air it carries, comets flying in the universe and space junk are also fatal dangers. If the spacecraft collides with these flying objects, these "mice" will become new space junk. I spent a lot of money to immigrate to Mars, and I died before I got there. Thanks!

Moreover, humans can only live on Mars for 68 days. An interest group at MIT did a study. If humans want to move to Mars, even if they bring enough plants to make oxygen, they can only last for 68 days at most. When oxygen is exhausted, human beings will die.

Since Mars is so close to the Earth that it cannot be migrated, it is only a dream to migrate to gliese Cc outside the solar system. According to the current population growth rate, the earth's population density will reach saturation around 1440. Since there is still 1440 years, with human wisdom, planet migration is not impossible. If the future planet migration can really be realized, then Gliese 667Cc is definitely the first choice.

The discovery of Gliese 667Cc is a milestone in the history of human exploration of the universe, which has created basic conditions for human migration. I believe that in the future, planet migration is no longer a fantasy.