Scientists have discovered 24 livable planets, which are in good condition and do not rule out the existence of alien life.

Many people think that the earth is the most perfect planet in the universe, and life appears on the earth because the earth is superior in both climate and environment, including its position in the universe. However, some studies in recent years show that this is not the case.

The earth is not perfect.

Take the solar system as an example. Many researchers have said that in the early days of the solar system, the most livable planets in the solar system were not the earth, but Mars and Venus.

A great deal of evidence shows that Mars and Venus were livable at least 4 billion years ago, and at this time, the earth was still in the late Phanerozoic period, and a large number of asteroids, comets and other serial explosions made it impossible to have a miracle of life on earth.

In addition, some researchers believe that the first planet in the solar system that gave birth to life may not be the earth, but Mars, which is currently being actively explored by human beings, hoping for space immigration.

This means that even in the solar system, the earth is not perfect, at least at the beginning, and the future will be accompanied by the evolution of the sun. After about1-2 billion years, even without the influence of human activities on the earth, the earth will become uninhabitable with the activities of the sun.

By then, the average temperature of the earth's surface will exceed 60 degrees Celsius, and the liquid water on the surface will evaporate. Before long, the earth will become the "second Venus", which may even be more serious than the Venus we see today. Naturally, the earth is nothing in the universe except the solar system.

Including some time ago, some researchers found that there are many planets suitable for the birth of life in the Milky Way, such as liquid water, dense atmosphere, suitable temperature, very many, and even everywhere. This modeling analysis also shows once again that the earth is not the most livable and special one in the universe.

Scientists have discovered 24 livable planets.

Since scientists began to study the planets in the sky, along with Galileo's invention of the telescope, scientists can also see farther space through the telescope.

Therefore, when more and more celestial bodies are found in the solar system, some researchers put forward a bold guess: there may be planets outside the solar system, but the road to finding exoplanets is not smooth. The main reason here is that the planet itself does not emit light, so if you want to find exoplanets, you need to observe the shadows on the surface of stars and look for their laws.

For example, we all know that when the planet moves around the star, the surface of the star will periodically appear shadows at this stage. In this way, we can find exoplanets by analyzing the period of shadows and analyzing a large number of observation data.

So, in the early 1990s, scientists finally discovered the first exoplanet. Now, more than 20 years later, with the development of human science and technology, scientists have discovered thousands of exoplanets. Although these exoplanets are only a negligible part of the vast universe, for human beings, each planet is a special alien world, enough for human beings to study.

So, among so many exoplanets, which one is most similar to Earth? According to the data, at present, scientists have successfully locked in 24 exoplanets through a large amount of data research, and believe that the climate environment on these 24 exoplanets is more livable than the earth.

This means that each of these 24 exoplanets is more perfect than Earth. If they are old enough, say, more than 3 billion years old, then these 24 exoplanets may all have civilizations. If they are older than the earth, then the advanced alien civilization we have been looking for may exist on these 24 exoplanets.

So, how do scientists judge that these 24 exoplanets are livable? Interestingly, although scientists have always used life on earth as a reference blueprint in the search for extraterrestrial life, in the search for livable exoplanets, scientists do not think that there may be a miracle we have been looking for in a yellow dwarf system like the solar system.

Which star systems are most likely to give birth to life?

The answers are red dwarf system and orange dwarf system. That is to say, it is particularly incredible that the places around small stars whose mass is smaller than the sun, brightness is not as bright as the sun, and life span is much longer than the sun are the most likely places to breed life and alien civilization? We continue to look down.

Why is the sun imperfect? As mentioned above, about1-2 billion years later, the earth will enter a "white-hot" stage because of the evolution of the sun. To put it bluntly, the sun will enter the later stage of life. At this time, the sun will become hotter and release more energy. Naturally, the earth will receive more heat and become uninhabitable.

Therefore, for an alien civilization or a living planet that wants to develop steadily for a long time, if they orbit around red dwarfs or orange dwarfs, then they don't need to have these troubles.

The reason is very simple, because these two star types, especially the smallest red dwarf, can even live several times, even dozens or hundreds of times longer than the sun, and because of their low heat, they will not pose too many threats to the planets in the livable zone. For the above life, there is enough time to evolve, so naturally there is no need to worry about lack of time. There is no way to find a new home before the home planet becomes uninhabitable.

What many people don't know is that in the universe, red dwarfs are also the most common residents of stars, while yellow dwarfs similar to the sun account for a small proportion. Naturally, we need to start looking for extraterrestrial life from the most common places.

For example, the proxima centauri Centauri system around us, 4.2 light years away, is a red dwarf star surrounded by a livable planet. Perhaps, there are already alien civilizations observing the earth. what do you think?