Water, the substance necessary for human survival, exists on the earth in three forms, and liquid water is an indispensable form for all kinds of species on the earth. Due to the special position of the earth, liquid water is difficult to find outside the earth, but its other form, water vapor, has been found outside the earth!
Water vapor on a black background
On November 18, a NASA research team discovered the presence of water vapor on Europa's second satellite (Europa), which has been confirmed by NASA. Jupiter, as the largest and gaseous planet in the solar system, has a lot of orbit around it, so far there are 79 moons, and excluding the eight planets, it is really not easy to find a planet with water vapor in the moons of each planet, I believe it must have taken a long time.
Since there is water vapor, and water vapor is evaporated from liquid water, is it possible that there is an ocean of liquid water inside Europa? In fact, scientists have long proposed this idea and have gone to find the answer. They believe that liquid water is more likely to exist beneath Europa's ice, and that this ocean of liquid water is more than twice as large as Earth's. Liquid water appears at temperatures between 0 degrees Celsius and 100 degrees Celsius (although water vapor also exists between this temperature, but it is mainly liquid water), Europa is so far away from the sun, how does it exist liquid water, and how does it evaporate into water vapor? Could it be the transformation of form caused by the heat generated by biological activities?
Europa surface
Under such questions, some scientists suspect that water vapor formed because Jupiter's strong radiation field stripped away water particles. On Earth, there was a faint but pronounced water vapor signal, which is a specific infrared frequency emitted by the interaction of water molecules combined with solar radiation. Another discovery is because of Jupiter's magnetic field disturbance to Europa, when Europa's northern or southern hemisphere passes through Jupiter's near-wood point, it will produce water vapor jets due to the disturbance of the magnetic field.
Humans discovered the presence of water vapor on Europa, lowering the threshold for searching for extraterrestrial life, just like the original Earth, producing amino acids in the ocean, followed by single-celled organisms, then evolving into multicellular organisms in the course of a long evolution, and then leaving the ocean and entering the land, beginning to produce branches, and partly becoming the ancestors of humans. Of course, we can't take the evolutionary process of human beings as the standard for finding life, because the environment is different, the earth's environment is very special, and the position in the solar system is also very special, so other planets may evolve other life forms in the presence of water vapor.
The discovery of water vapor beyond Earth is indeed a key factor in the detection of atomic species. Mars, Titan (Titan), Europa, these three planets in the solar system that we humans consider "once lived", "may evolve life in the future", and "future migration", more or less have life potential, but at least for now they are still moving in those three directions. It is exciting to find another form of water outside the ground, and it is believed that scientists will use various devices to observe, to study Europa, to collect relevant samples of Europa (future), these efforts believe that they will further reveal Europa's life potential in the future.
Titan surface landscape simulation
Nevertheless, the current should also focus on the exploration of the moon and Mars, because Mars, like the earth, is in the habitable zone of the solar system, and its surface has been confirmed to have had liquid water, and now mars will also find obvious traces of water flow, and it and the moon are also the planets with the most probes made by humans, and if they want to move to Mars, the moon is an outpost that cannot be ignored. What exactly is on Mars? Can you transform survival? We have to wait a few months later for the Chinese rover to visit, and I believe that by then, everything will become very transparent!
Mars