Will the greenhouse effect and being far away from the main star create a livable environment?

Maybe it will. Prior to this, scientists believed that water was a necessary condition for extraterrestrial planets to breed life. In the process of searching for life outside the solar system, scientists focus on "livable planets" around other stars. The temperature of planets like the earth should not be too high or too low, so that liquid water can be maintained on the surface of the earth.

A planet can't go too close to its main star, because the star is too hot, which will cause the planet to be scorched. But at present, scientists believe that an extreme greenhouse gas effect will also make the earth dry, similar to what happens on the surface of Venus.

The latest research shows that the carbon dioxide effect is very powerful. As the main star heats up, the surrounding livable planets will become hotter. The results of this model study were published in the recently published journal Nature Communication. Max Popp, a postdoctoral researcher at the Max Planck Institute of Meteorology in Germany, said: "This is a very interesting study. It will not only reveal the location of the planets, but also analyze whether the planets are livable. "

In order to better understand the situation leading to this extreme greenhouse gas effect, Pope and his research colleagues built a 3D model of the Earth-like planet completely covered with water. This simulated water world allows scientists to ignore the complex effects of continents and seasons.

The researchers found that once the carbon dioxide index of this model reaches 1.520, the earth's climate will become unstable, and the surface temperature will quickly rise to 57 degrees Celsius, forming a warm and humid greenhouse effect. Popper said: "Earth-like planets will eventually become very warm, and it will happen suddenly." Researchers believe that a wide range of cloud changes will produce a warm and humid greenhouse effect. The position and thickness of the cloud will change the heat that the planet captures from the star. Although this discovery implies that greenhouse gases are fatal to planets that are too close to the main star, the earth is safe, and the carbon dioxide index of the former is much higher than that of the earth. Pope stressed that human activities are unlikely to induce similar humid greenhouse gas effects on the earth.