As we all know, the Moon is full of craters which are made by meteorites hitting it through the millennia, and that is as a result of the lack of atmosphere on the Moon. There is actually no protection from external objects, which makes it an ideal place for the landing from meteors.
Years ago, there were some unusual foreign minerals which were discovered in those craters of the Moon, which may be alien. This claim was made in a paper which was published years ago, saying that the rare minerals are probably not indigenous to the Moon as it was previously believed.
After re-examining the material taken from the craters and the modeling meteor effects on the Moon, the scientists have discovered the magnesium-rich minerals which were called spinels and the olivine which is often found in asteroids. Scientists believed that these minerals were forced to the surface by the effect of the asteroid or meteorite which caused the crater.
Such mineral stones are alien to the Moon in that they are pieces of ancient broken planets from the early formation of the solar system. Initially, the scientists believed that such rare minerals were formed in the mantle of the Moon. But, now they think that the minerals are alien as they were discovered inside the craters and not anywhere else on the surface of the Moon.
Also, it was believed that any collision that big, would melt or vaporize the impacting material, leaving simply geometrical traces and tiny fragments behind.
This also suggests that from the early times of the creation fragments of earth of the planet may have also been caught on the lunar surface, which means that in the near future, we are probably going to find places of the first days of our planet hidden somewhere in one of the craters of our Moon.
On our planet, spinel forms under high temperatures, as well as pressures were not seen near the surface of the Moon. Also, it is found in some meteors or asteroids.
However, the detection of concentrations of spinel and olivine in the central lunar crater peaks raised different speculations about the origin of the mineral.
The authors of the study performed simulations with the use of a variety of impact speeds between six and 16 kilometers per second.
According to their simulations, there were about a quarter of lunar impacts happening at speeds which are below 12 kilometers per second, which is slow enough for such a significant fraction of the impacting object to remain largely intact.
Also, they revealed that asteroid impact speeds can be as low as three, four or even five kilometers per second, and still leave a crater with a central peak. However, there were some concentrations of the mineral spinel on the surface of the Moon which cannot be connected with impact events.
So, are these minerals an alien material?