Life

Is Earth Ultimately Doomed to Become Another Venus?

  It is generally speculated that Mars once had a liquid ocean, and also gave birth to intelligent civilizations like humans, but because Mars is too small, the core cools prematurely, loses the protection of the magnetic field, and is attacked by the “solar wind”, causing the atmosphere to become thinner and thinner. In the end, it became a barren planet where life could not survive. Therefore, some scientists speculate that the core of the earth will cool down one day, and I am afraid that the earth will become another “Mars” at that time.
  In fact, Mars is not the future of Earth, Venus is!
  The current average temperature on the surface of Venus is as high as 464°C, so it is called a “hell planet”. Not to mention life in such an environment, even human probes can’t last long-the human probe that has stayed on the surface of Venus for the longest time so far, Only lasted 2 hours.
  Why is Venus so hot? Because it has a much thicker atmosphere than the Earth, which causes its surface atmospheric pressure to be 92 times that of Earth! And 96.5% of the material that makes up the atmosphere of Venus is carbon dioxide, so the greenhouse effect of Venus is the most serious in the solar system.
  In fact, scientists have found that Venus may have had a large ocean of liquid water, a suitable temperature and a balanced atmospheric pressure, and it is not the tragedy it is today. It is the continuous brightening of the sun that created the present Venus.
  The reason why the sun can emit light and heat comes from the nuclear fusion reaction inside it-hydrogen continuously fuses into helium, releasing a large amount of energy. However, due to the temperature and pressure of the sun’s core, helium cannot be fused. Therefore, as hydrogen continues to fuse, more and more helium is produced and piled up in the sun’s core, making the sun’s reaction shell bigger and bigger. In this way, more hydrogen can participate in nuclear fusion per unit time, releasing more energy.
  This is the fundamental reason why the sun is getting brighter.
  As the sun continues to brighten, the temperature on the surface of Venus is getting higher and higher, and the evaporation of liquid water is also rising. When it reaches a certain level, almost all the water on Venus exists in the form of gas. Under the strong radiation of sunlight, the structure of water molecules in the atmosphere will be destroyed, and then decomposed into hydrogen and oxygen. Since the relative mass of hydrogen is very low, the gravity of Venus cannot effectively bind it, so hydrogen will continue to escape, unable to form a water cycle, and gradually lost all liquid water on Venus.
  Liquid water is an essential condition for planetary plate movement. Without liquid water, Venus cannot carry out plate movement, so the pressure inside Venus can only be released through volcanic movement. And as we know, every volcanic eruption releases a large amount of carbon dioxide.
  Due to the relative mass of carbon dioxide, the gravity of Venus can firmly bind it, so these carbon dioxide will “accumulate” in large quantities. As time goes by, the atmosphere of Venus becomes thicker and thicker. As a result, the greenhouse effect on the surface of Venus becomes stronger and stronger, and eventually evolves into a “hell planet”.
  It is worth noting that today’s sun is still continuing to brighten. According to scientists’ estimates, the brightness of the sun will increase by about 10% every 1 billion years on average. At this rate, in about 1 billion years, the average temperature of the earth’s surface will reach 47°C to 70°C, which is enough to evaporate all of the earth’s oceans.
  The volume, mass, and material composition of the earth are also very similar to those of Venus. Therefore, by that time, the earth that has lost its ocean is likely to follow in the footsteps of Venus and gradually evolve into another “hell planet” in the solar system.

error: Content is protected !!