A study reveals that after all, maybe it is even just the planet Earth with unique conditions allow it to have water in liquid state, to allow the existence of life, and the other planets do not. At least in a technological time and age when the human being can discover it.
Scientists announced this week that other planets, other than Earth, may never be habitable, since our planet is exceptional in its ability to have water in the liquid state, a key ingredient in the existence of life.
Thus, the scientific community reveals that it believed it could find life on planets that orbited stars – like our Sun – and were in the habitable zone, an area where the radiation level is enough to not boil or freeze the oceans.
According to this theory, Europe (moon of Jupiter), Enceladus (moon of Saturn), and some exo planets of other solar systems, could come to have life. Now, a team of scientists has revealed that this scenario is very unlikely, in a study published this week in Nature Geoscience, according to AFP. Jun Yang and Yongyun Hu of Beijing University in China, and the other team used climate models to simulate the evolution of planets.
And the conclusion was that without the greenhouse gases existing on planet Earth, the energy needed to heat a planet would move it from an icy star to a too hot star, ie without an intermediate stage. And it is at this intermediate stage that temperatures are mild and there is water in the liquid state, and life can arise.
Thus, following this model, Europe and Enceladus, would move from ice balls to balls of fire as the sun reached its hottest phase, billions of years from now, according to the team.
Our planet Earth was once an icy planet and its temperature warmed about 600-800 million years ago, all thanks to the greenhouse gases emitted by the volcanic eruptions. Soon, less solar energy was needed to unfreeze the planet and Earth was able to have the ideal temperature for the appearance of life.
Scientists also say that the greenhouse gases present in the atmosphere help keep the planet warm enough for the population, animals and plants to survive.