There are round glass balls on the moon, how can this thing appear on the moon?
According to an article recently published in the Chinese Science Magazine "Science Bulletin", when the mainland Yutu-2 lunar rover was cruising on the far side of the moon, it found several transparent glass balls, with a diameter of between 1 and 4 centimeters, and some of the shapes were very rounded, which made people feel surprised.
For each of us, glass balls are not very rare things, most people have played, but we also know that these glass balls are produced in factories, and there are almost no naturally formed round glass balls in the earth's nature, so why are there such glass balls on the moon?
To put it bluntly, in fact, the cause is not complicated, middle school chemistry has told us that the components of glass sodium silicate, silicon dioxide and calcium silicate, etc., and the sand composition on the beach is similar, there are friends who have seen the sand on the beach burned to a melted state will form glass, so the raw materials of glass are very common, and in the moon soil and moon rock of the moon also contain a lot of silica, sodium silicate and calcium silicate and other components, as long as they encounter high temperature environment will also become glass.
On Earth, we can make glass by heating the high temperature in the furnace, and the erupting volcano can also turn lava into glass, but on the moon there is neither a furnace nor a volcano, how can there be a glass ball?
If we look at the large and small craters on the moon that are scattered around the globe, they are all formed by asteroids in space hitting the lunar surface.
Because there is no air on the moon, so the asteroid impact on the lunar surface will not be blocked by the air as it fell on the earth, so the impact speed is extremely fast, many will reach tens of kilometers per second, so the energy released is also very large, at the moment of impact, the asteroid and lunar surface material will instantly melt into liquid lava with strong fluidity, due to the kinetic energy formed by the impact, these liquid lavas will also splash around, as if the dripping water droplets are also spherical.
At this moment, some of the liquid lava droplets that splash out will also form circular glass balls, in the process of splashing, lava droplets will cool rapidly, especially at the time of the moon night, the surface temperature of the moon is more than one hundred degrees below zero, and some lava droplets have cooled into a solid state when they fall back to the moon table, so that these glass balls are formed. So in fact, the formation time of these glass balls is very short, generally not more than one minute.
In fact, the glass ball seen by the mainland Yutu II is not the first time that humans have found this kind of thing on the lunar surface, and the astronauts who reached the surface of the moon in the Apollo moon landing program of the United States have also seen it, and brought back a number of lunar glass balls, as shown in the following figure, which also shows that glass balls are not rare on the moon, and there should be many.
Nowadays, our human research on the moon is actually only the initial stage, so far only a few astronauts have landed on the moon, dozens of probes and lunar rovers have reached the lunar surface, and there are still many information and secrets on the moon that we need to discover and understand.
Now the mainland has launched a manned lunar landing program, it is estimated that continental astronauts will land on the moon around 2030, and the United States, Russia and other space powers also have their own lunar landing plans, so in the next 30 years, the moon will usher in the stage of human exploration, after this stage, human beings will enter the development and utilization of the moon stage.
Reference: Global Network February 19 article "Yutu-2 finds transparent glass ball on the moon"
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