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There is a satellite in the solar system. It is an ice world. There may be an ocean under the ice.

date: 2019-01-07
Number of visits:: 17

The solar system is home to the earth. In our eyes, the solar system is very large. The current technology of mankind can not get out of the solar system, but the solar system is just like dust in front of the Milky Way. There are hundreds of billions of galaxies such as the solar system. Although the solar system is only a small Galaxy, it has become extraordinary because of the existence of the earth.
Earth is a living planet, the ruler of this planet. The earth is able to give birth to life and human beings, can not leave the boiling water. If there is no liquid water, there will be no birth of life on Earth. And 71 % of our surface area is ocean. In human cognition, water is the source of life, and the probability of the birth of life on the planet of liquid water will be very large.


Therefore, after humans came out of the earth, they began to search for extraterrestrial life. The first thing to see is whether the planet has liquid water. Scientists have discovered through astronomical telescopes that many terrestrial planets outside the solar system have the presence of liquid water, so the probability of life on these planets will be much greater. However, these terrestrial planets are relatively far from the earth. With the current scientific and technological solar system of mankind, it is not yet possible to go out, let alone explore planets outside the solar system.
Due to the limitations of human science and technology, we can only temporarily place the search for extraterrestrial life in the solar system. So the eight planets in the solar system, which planet other than the Earth has liquid water? In fact, so far, no large amount of liquid water has been found on the surface of any planet. Previously, scientists suspected that there may be liquid water on Mars, but later regular exploration found that the surface of Mars was full of sand and no liquid water was found. However, some time ago, a detector discovered a huge ice puddle on Mars, but this is only a long-term perspective. Whether or not it is really a large puddle still needs to be approached by future detectors to understand.
For liquid water to exist on the surface of the planets of the solar system, it must be within the habitable zone, but there is no liquid water on the surface of Venus and Mars in the habitable zone. Planets outside the habitable zone are relatively low in temperature due to their distance from the sun, and are less likely to have liquid water. Although the solar system has no liquid water on the surface of other planets except the Earth, it does not represent the lack of water in the solar system.


In fact, the solar system does not lack water, but many of them exist in the form of frozen water. We all know that Jupiter is the largest gaseous planet in the solar system. Its size and mass are very large, so its gravity is also very strong, which attracts many asteroids around it, so Jupiter has a large number of satellites. Among them, Europa has attracted the attention of scientists. Why is this?

In December 1995, NASA's Galileo probe entered the orbit of Jupiter. In the first batch of observations, the Galileo detector discovered that Europa was a cold world. After adjusting its orbit, it passed about 351 kilometers above Europa and discovered ice that covered the mountains and covered a large amount of ice. Europa.

Europa is an ice world. When Europa entered the list of scientists 'concerns, he conducted a series of observations and studies on it, resulting in more exciting discoveries. Originally, scientists observed that Europa's geomagnetic North Pole was constantly changing, moving about once every 5.5 hours. Maybe a lot of people don't understand. What does that mean?


The change of the magnetic poles on the planet is a very important data. We know that the earth's geomagnetic North Pole moves at a rate of 20.5 meters per day. Its significance is to tell us that there is a liquid conduction layer under the ice of Europa. That is, there is a huge liquid ocean under the ice. This discovery is very impressive. If Europa is just a planet full of ice, there is nothing worth studying, but if there is a liquid ocean under the Europa ice, then the meaning is different.
The existence of a liquid ocean means that there may be life. This is what makes scientists most excited. Perhaps mankind has been searching for extraterrestrial civilization for decades and may find it on Europa in the future. This is a big discovery that can carry people into history. Later, American scientists used the Hubble Space Telescope to discover the pinnate jet of Europa and found a large amount of hydrogen and oxygen in the southern hemisphere of Europa. This is the electrolysis of water ice materials ejected from the surface cracks by the ocean under Europa ice. product.
At this point, the fact that there is a liquid ocean under the ice above Europa is no doubt, but it is not easy to explore the ocean under this ice. The thickness of Enceladus ice may range from several kilometers to dozens of kilometers, and the depth of the ocean below may reach tens to hundreds of kilometers. No less than the oceans of the earth. Don't underestimate the small size of the planet, but the amount of water stored on it far exceeds the amount of water on the surface of the Earth.



To understand whether there is life in the ocean under the Enceladus ice, it is necessary to drill through the ice to go deep into the sea water. Therefore, scientists designed a glacial drilling robot to serve the ice of Drilling Earth II. It looks like a torpedo. Nuclear propulsion can penetrate glaciers at least 30 kilometers thick.
Although this glacial drilling robot is not difficult to manufacture, it is also a difficult challenge to transport it to Europa and drill tools on Europa. Although it has strong nuclear power propulsion, scientists estimate that it will take two or three years to drill through the ice above Europa.
However, at present, this is only an idea. With current human technology, we have not yet been able to go to Europa for ice drilling missions. What we can do now is to follow the surface of Europa and see if we can have further. Discovery. Scientists have suggested that we can send a spacecraft to the equatorial region of Europa. There are many huge icicles in that place. These icicles are formed by the solidification of liquid water emitted by the ocean under the ice.


If there is life in the ocean under Europa's ice, there may also be primitive life like microorganisms, bacteria, in these erupted liquid waters. Just like the water on our earth, under a microscope, we find some bacteria and other tiny life. If the existence of life can be found in the icicles formed by these erupted liquid water, it can be determined that there is life in the ocean under the ice, and there may be complex organisms such as fish.

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