Is there water on the moon? Why look for traces of water on the moon?

After exploration and research, a team of scientists from the United States finally found that at least 4, square kilometers of the moon surface has the ability to capture water, which means that there are abundant water resources on the moon, and the dream of transforming the moon and building a human base may come true in the future. The moon is the only natural satellite on the earth and the closest planet to the earth in the vast universe. The United States has carried out many missions to the moon, but no traces of water have been found on the moon. With the rise of Mars, Venus and other explorations, the moon is gradually left out. The explorer lunar probe launched by the United States found water on the surface of the moon, which made the moon get everyone's attention again.

when some scientists analyzed the photos of the moon sent back by the probe, they found that there seemed to be an ice lake in the south pole of the moon. At that time, this photo that looked like there was water on the moon was controversial. Therefore, in order to find the answer, NASA decided to go to the moon to find possible water. Since there is no atmosphere on the moon, it can be proved that there is water on the moon only by capturing hydrogen atoms with neutron spectrometer. Finally, after nearly two months of lunar scanning investigation, the lunar probe found the existence of water in the basin areas at the two poles of the moon. The water in the lunar base is not liquid, but exists in the form of water ice, because the temperature there is extremely low, and the annual average temperature is below -15 degrees Celsius. This discovery is very gratifying. At the same time, scientists also suspect that there may be more water under the surface of the moon because the water ice at the lunar base is hidden under the lunar soil layer with a thickness of tens of centimeters. Finding water resources on the moon has become one of the important lunar exploration projects.

Especially today when human beings want to transform the moon, there are water resources on the moon, which can help solve many resource problems and is also the key to whether human beings can immigrate to the moon. Scientists at the University of Hawaii have been engaged in this research for many years. They found that there is a lot of water in the high latitudes of the southern hemisphere of the moon, and there may be a lot of water stored under the surface of the moon. Astronomers are surprised that there is water on the moon, which also shows that there is water or various substances in the universe, at least in our solar system, because the position of the moon is not conducive to the formation of water. The moon is a satellite of the earth. It follows the earth around the sun. Near the earth's orbit, water cannot exist in the form of ice crystals, so it is not easy for the moon to catch ice crystal particles and become a water-rich planet. Water molecules will form ice crystal particles and become larger celestial bodies to capture. For example, Jupiter's moons Io, Europa, Ganymede, Callisto, Saturn's moon Titan, Saturn's rings, and even Uranus and Neptune themselves have a lot of water.

So since there is water on the moon, where does it come from? It is generally believed that some water-bearing comets left behind after hitting the moon. We all know that comets are small celestial bodies carrying a lot of water and ice. Most of them are formed on the periphery of the midline of the asteroid belt, the Kuiper belt and the Oort nebula. They are at least 3 million kilometers away from the moon, and some even tens of billions of kilometers away. When it hits the moon, the ice on the comet will remain. In billions of years, the surface of the moon has also been hit by a large number of comets and asteroids. Just look at one crater after another. If it is really so ugly, the water resources on the moon may be even richer than we thought.