What are the criteria for scientists to judge that the second earth is suitable for human habitation?

For many years, human beings have been looking for it. The second earth? The road is painstaking. At first, scientists took the earth as the blueprint, but with the deepening of research, scientists found that even some planets that are not in the livable zone may have life on them, such as Europa in the solar system. Previously, scientists had speculated that there was a warm liquid ocean under its ice.

What is a livable planet?

Simply put, the earth is the most livable planet known at present. It is located in the livable zone of the star (sun) with a moderate distance. It has a powerful atmosphere, which can help isolate all kinds of radiation and ultraviolet rays in space, and it also has liquid water, which are prerequisites for life on earth.

As we mentioned above, in the past 20 years, scientists have been trying to find planets similar to the natural environment of the earth, thinking that if the resources of the earth are exhausted one day in the future, human beings can immigrate to these planets and continue human civilization.

Unfortunately, although thousands of exoplanets have been discovered over the years, nothing has been found. Scientists also began to change their thinking, thinking about whether the key factors in previous judgments were wrong, or what key factors were missed in the search. That was not the case. Recently, British scientists have found a new answer.

What have British scientists discovered?

According to Science and Technology Daily reported in June, scientists from Britain discovered for the first time through modeling experiments that atmospheric mineral dust can improve the livability of terrestrial planets, which has been ignored in previous observations of exoplanets, but modeling found that it is actually inseparable from the climate environment on the planet.

What is mine dust? Simply put, it is a tiny particle that exists in the atmosphere and has a wide range. Volcanic ash produced during volcanic eruption, dust formed after rock weathering, and even production dust produced by biological activities. , all belong to an atmospheric mineral dust.

Its main components are carbon and silicate. Take the earth as an example, the atmospheric mineral dust on the earth can keep the earth warm, which means that if an exoplanet is not in the perfect position in the livable zone, but there is a lot of atmospheric mineral dust in its atmosphere, it is very likely to have a livable climate.

This discovery also means that many potentially livable planets may be misjudged by scientists because scientists have previously ignored atmospheric mineral dust. At the same time, atmospheric mineral dust will also blur biomarkers, which means that if there is atmospheric mineral dust on a planet, there may be life on it.

What do scientists do?

Now that we have found a new direction to judge, scientists are also going to look for planets with atmospheric mineral dust in the universe, so as to judge the climate environment of exoplanets and the possibility of alien life on them through a series of means such as chemical analysis, so as to realize human dreams? What do you find in the universe? Companion? .

Unexpectedly, the atmospheric mineral dust harmful to human health on the earth can help an exoplanet in the universe? Change your life against the sky? Become the future of mankind? The second earth? As for the candidate target, as for the result, let's expect better news.