The Moon | The provinces

The moon, one of the 150 objects that run the planets of the solar system, formed around 4.5 billion years ago. It is the fifth largest natural satellite of the solar system, with a diameter that is the length of the Tajjo River three times. It reflects part of the light that comes from the sun and, because of the proximity of the earth, is the object of the brightest night sky. The core is rich in iron and the crust is formed by minerals that usually contain magnesium, oxygen and silicon. Currently the surface is covered with dust and rocks, but it had geological activity and held a sea of ​​magma. Moreover, it is strewn with thousands of craters formed by the clash of meteoroids, comets, etc. The largest of them is almost as deep as Everest. Galileo was the first to see the shadow of these craters, with his telescope. The book ‘The Sideral Messenger’ is interesting in which he describes the surface of the satellite.

The moon revolves around the earth and around it at the same speed. This fact makes the earth that we always see the same part (face) of the moon, one half. The other half was unknown until it was photographed by the various Apollo missions, sent to explore our satellite. For example, the LRO probe gives a complete vision of the moon. Because of three effects, we actually see more than half. About 59%. The first is associated with small speed variations during the elliptical job. The second is because the axis of the moon, as happens with the earth, is inclined with regard to the job. The third are the different corners with which we see the moon because of the terrestrial rotation. On the other hand, the turn of the moon around the earth makes the sun, in a complete bend, once behind it and another to his forehead. In the first case we don’t see it in the night sky and in the second we have the full moon. Between them is the growing and decreasing room. This turn also produces overshadowed from time to time.

The origin of the moon thought it was a heavenly body attracted by the earth. With the Apollo missions, however, it was found that the proportions of oxygen isotopes in lunar minerals are the same as those of terrestrial minerals and very different from those of meteorites. This result indicates that the earth and the moon are related. For this reason it was argued that its origin was the tangential collision of a body, the size of Mars, which formed an album with material that consisted of components of the earth and the body it touched. That album gave rise to the moon. But very recently the full parable between the composition of the moon and the earth is confirmed, so the current interpretation is that the collision was frontal and that part of the body that collided became part of both the earth and the moon. Something important. The moon lacks continental drift and climate change, so the rocks give us information about the early history of the solar system.