Why have scientists been obsessed with finding planets similar to the earth, rather than satellites?

Hawking, a famous physicist, once said: “if human beings want to continue for another one million years, they must set foot on a land that has never been set foot in before.”

Since the birth of the earth about 4.6 billion years ago, scientists have speculated that there have been five large-scale mass extinctions. With the lessons learned from the past, human beings should be ready for the future. Otherwise, human beings will become the leading role of the sixth mass extinction of the earth.

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What’s more, the earth is the planet on which human beings rely for survival. At present, human survival is absolutely inseparable from the earth. However, the current situation of the earth is getting worse and worse. I don’t know which day it will not be able to carry human beings or even all the creatures on the earth.

So scientists have to focus on the vast universe, hoping to find a habitable planet with similar environment to the earth, which is suitable for human interstellar migration, so as to be prepared in case.

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Xiaobian believes that for a small number of people, interstellar immigrants will feel particularly incredible, even fantasy. But most people should be looking forward to it! After all, the development of modern science and technology of mankind can have such great achievements in nearly a hundred years.

Where is the end result of human beings on earth? The earth exists in the solar system, so let’s focus on the relatively close solar system!

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After exploring many celestial bodies in the solar system, scientists found that Titan, Mars and Saturn are among the best in the whole solar system.

Titan satellite

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Compared with Saturn and Mars, you should know less about Titan. Titan, also known as Titan, is a satellite orbiting Saturn and the second largest satellite in the solar system.

It was discovered by Dutch astronomers in 1655, but it was only a preliminary discovery at that time, and did not do much research. It is only with the development of science and technology that Titan can be re explored.

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Titan is the only satellite in the solar system with a thick atmosphere. Besides the earth, Titan is the only celestial body with lake, sea and rain. It is considered by scientists to be one of the most similar planets to the earth, so it is highly suspected of the existence of life.

But before that, most of the habitable planets scientists were looking for were planets, not satellites. Why?

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Compared with earth like planets, satellites do not emit light, they can only revolve around the planets, and they orbit with the planets around the stars, which is a bit similar to the agent of more than three levels, so they lack the irradiation of stars, and their energy is scarce, and they can not save energy.

And they can’t have magnetic fields like other planets. The biggest function of the magnetic field is to form a natural barrier to concentrate cosmic rays on the north and south poles of the planet. Without it, it would be fatal.

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But it has to be said that Titan is an exception. Although it does not have stars to provide heat for it, it has its own geothermal energy, independent of stars and very independent. Titan has enough geothermal energy to sustain life.

With more and more scientists exploring Titan, we have more confidence in interstellar migration. There are countless planets in the universe. One has two, two has three, and three has more hope.

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However, Xiao Bian believes that even if human beings can find many livable planets suitable for human survival in the future, human beings have to protect the earth. The earth is our biological mother, and no one will forget to have a stepmother.

Do you have any ideas about Titan or other satellites? Welcome to comment area.

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