The Earth's moon is similar to the Earth in that it has a crust, mantle, and core. The composition of the two bodies is similar, which is part of why scientists think the moon may have formed from a large meteor impact breaking off a piece of the Earth while it was still forming. Scientists have samples from the surface, or crust, of the moon, but the composition of the inner layers is a mystery. Based on what we know about how planets and moons form, the core of the moon is believed to be at least partly molten and likely consists primarily of iron , with some sulfur and nickel. The largest portion of the Earth's moon is the mantle. This is the layer between the crust the part we see and the inner core.
What the Apollo Moon rocks told us | nutriologia-ortomolecular.info
How do we know the age of the surfaces we see on planets and moons? If a world has a surface as opposed to being mostly gas and liquid , astronomers have developed some techniques for estimating how long ago that surface solidified. Note that the age of these surfaces is not necessarily the age of the planet as a whole. On geologically active objects including Earth , vast outpourings of molten rock or the erosive effects of water and ice, which we call planet weathering, have erased evidence of earlier epochs and present us with only a relatively young surface for investigation. One way to estimate the age of a surface is by counting the number of impact craters. This technique works because the rate at which impacts have occurred in the solar system has been roughly constant for several billion years. Thus, in the absence of forces to eliminate craters, the number of craters is simply proportional to the length of time the surface has been exposed.
The Age of the Moon
Meteorites are among the oldest objects we know about - formed about 4. But how do scientists know this? This article describes the principles and methods used to make that determination. There are well-known methods of finding the ages of some natural objects. Trees undergo spurts in growth in the spring and summer months while becoming somewhat dormant in the fall and winter months.
Evolutionists say that the Moon is 4. Is that correct? Last month we saw that rubidium-strontium isochron dating of the Apollo 11 moon rocks showed that the moon is 4.