"Why can't Venus and Mars, the only planets in the solar system that have life, survive on Earth?" ## Introduction
Although the Earth's surface environment is already very harsh for human beings, it is "the most suitable for life" in the solar system.
The Earth is the third planet farthest from the Sun, and the sun's rays it receives can meet the energy needs of life and are full of vitality.
However, the two planets Venus and Mars, located inside and outside the earth, have also had traces of life, so what is the reason why the two planets Venus and Mars have not been able to achieve life?
1. Venus: High temperature, high pressure, harsh environment.
Venus, the second planet in the solar system, is closer to Earth, but it is the "hottest" planet in the solar system, warming nearly five times faster than Mars.
However, the temperature of Venus's "furnace" is not caused by its proximity to the sun, but by its dense atmosphere "greenhouse effect", which makes it unusually hot.
The diameter of Venus is not much different from that of Earth, in other words, Venus is about the same size as Earth, but its atmosphere is much thicker than Earth's, up to 90 kilometers thick.
The Earth's atmosphere is dominated by nitrogen, but Venus's atmosphere is home to nearly 75% of carbon dioxide, which is much more heat-absorbing than nitrogen.
Venus's atmosphere is very dense, and the atmospheric pressure on the ground is equivalent to 90 times that of the Earth, which is equivalent to a person at the bottom of the ocean at a depth of 900 meters from the Earth, which is unbearable.
In addition, Venus's atmosphere also contains a large amount of sulfuric acid and sulfuric acid mist, which will have a strong absorption effect on the sun's rays, resulting in a rapid increase in temperature.
The average surface temperature of Venus can reach 470°C, and it can reach as high as 600°C at noon during the day and only 400°C at night.
When Venus rotates, the daytime sunlight shines on the surface of the earth, and the material on the ground will absorb energy, and then gradually release heat outward at the speed of heat dissipation of the object, and the temperature of the ground will continue to rise over time.
Touching the atmosphere causes a qualitative change in the temperature of the gases in the atmosphere, such as from liquid to gaseous, and these gases have a large greenhouse effect on the sun's rays.
Therefore, there are a lot of greenhouse gases in the atmosphere of Venus, and once there is a place in the atmosphere where the temperature rises, it will conduct heat to other places at a very fast rate, so that the temperature will continue to rise.
The large amount of water vapor in Venus's atmosphere conducts the temperature difference from the sunny side to the cool side, so Venus rotates very slowly, the length of the year is about the same as the length of the day, and the ground is in a state of extreme heat.
Temperatures near the sun continue to rise, metals melt quickly, the surface becomes a fiery ocean, and various magma eruptions release large amounts of carbon dioxide and volcanic ash.
2. Venus: A global volcanic eruption.
This ash and carbon dioxide will remain stagnant in the air around Venus, so there will be a continuous flow of lava from the volcanoes of Venus, covering the entire planet's surface.
In this process, carbon dioxide and sulfuric acid are slowly evaporated from the atmosphere, releasing a large amount of heat, which melts back to the surface and becomes lava.
As a result, the energy inside Venus is increasing, and the atmosphere is becoming more and more intense, and finally a global volcanic eruption is formed, which completely erupts the ocean on the surface of Venus.
The causes of global volcanic eruptions on Venus are the same as those on Earth, they both have active plate movements, but the difference is that the plate movements of Venus are caused by the absorption of sunlight, thermal expansion, cold contraction.
Due to the very high amount of water vapor in Venus's atmosphere, the air density is low in the atmosphere and dense in the hot places, causing the hot air to flow to the cold places.
Venus has only one large plate on its entire surface, so there is no movement of plates on Earth, which exacerbates the temperature in the hot zone by sending hot air to low temperatures.
The magma on the surface of Venus will continue to erupt, and finally the surface of the ocean will erupt dry, Venus will have no ocean, the temperature will continue to rise, and finally form a global arid hell planet.
Therefore, Venus is the "most hell-like planet", its temperature and atmospheric pressure are very high, which is equivalent to hell, and it is not suitable for life.
But before Venus "died", there was a period when Venus had a liquid ocean, and that was the early days of Venus, when the Sun changed from "juvenile" to "adult", and the energy it released continued to increase exponentially.
As a result, Venus has liquid water soon after birth, but as the Sun becomes stronger, the temperature of Venus continues to rise, and when the core of the Earth's inner water begins to cool from the surface, the magnetic field of Venus will also disappear.
Without a magnetic field, Venus cannot protect its atmosphere from the erosion of the solar wind, so the water vapor in Venus's atmosphere will continue to be blown away by the solar wind, and Venus will soon have no atmosphere.
The temperature of Venus can change drastically, from very low temperatures at night to very hot places close to the Sun, and Venus will gradually lose its atmosphere for a long time or even permanently under extreme high temperatures and extreme low temperatures.
Therefore, Venus's liquid ocean will gradually evaporate without an atmosphere, and finally turn into steam, and Venus's eternal regret is that her ocean did not have time to escape, and the canopy became a dead desert planet.
3. Mars: A dry desert planet.
Mars is the closest planet to Earth, but it is the coldest planet in the solar system, with temperatures reaching as low as -180°C.
The atmosphere of Mars is very thin, equivalent to the highest atmosphere on Earth, and because of this, the highest altitude of the Nanterre volcano is only about 1/300th of the height of the Earth's atmosphere.
As a result, the Martian atmosphere does not insulate greenhouse gases well, resulting in very low temperatures on Mars, although Mars and Venus have similar temperature differences, but the temperature range of the Martian atmosphere is only about 100°C.
Mars has a very thin atmosphere, only two percent of Earth's, while Venus has 90 times the Earth's atmospheric pressure, so neither is suitable for life.
The main component in the atmosphere of Mars is carbon dioxide, which accounts for 95%, so the air pressure in the atmosphere of Mars does not change with the seasons, but with the change in temperature.
When the temperature gets hot, the temperature difference between day and night on Mars is very large, and the carbon dioxide in the atmosphere will slowly evaporate, and the atmospheric pressure will rise accordingly, but the atmosphere of Mars is very thin.
Therefore, the increase in atmospheric pressure is very small, and it will be absorbed by the ground and air, and in the end only a few percent of the atmospheric pressure will rise, and there will be a little thick frost in the polar regions.
When the temperature gets colder, the carbon dioxide in the atmosphere will re-form an ice sheet, and finally only the polar regions have carbon dioxide ice about half a meter thick, which is the "frost" of Mars.
But the water inside Mars, the Earth's core will soon cool and condense into ice, and without the liquid ocean on the surface, Mars will have no magnetic field, and the atmosphere will be blown away by the solar wind.
Mars will lose its atmosphere without the protection of the magnetic field, and the disappearance of the atmosphere will leave Venus without a liquid ocean, and can only slowly evaporate its own ocean in the process of the atmosphere slowly dissipating, and finally become a dry desert.
Venus is slightly larger than the star, so the time for the disappearance of the magnetic field of Venus is very short, less than a thousand years, while Mars has a full 3 billion years to dissipate the atmosphere, so Venus stays in the liquid ocean for 100 million years longer than Mars.
Mars also had traces of life "before death", it was born very similar to Earth, with liquid oceans and atmospheres, and a small number of life forms that formed after them also grew on Mars.
But without temperature on Mars, the life of the earth could not resist the dangers of the sky, and finally when Mars lost its atmosphere, the life of Mars was also taken away by mysterious external forces, and Mars became the doomsday alien star in the solar system.
epilogue
The earth is the most expensive planet in the solar system, so we must cherish the ecological ring of Mexico, and Fangda and his family have a good living environment.
In the future, scientists will continue to explore planets outside the solar system, trying to find out if there are planets similar to the earth in the universe, so as to find another "earth".
Although Venus and Mars have not left any life, they have traces of life, and we should protect the Earth and not let it become another Venus or Mars.