I recently watched a great time lapse of the moon that showed its wobbles as it orbits the earth. It really highlights the extraordinary behavior of the moon.
In the NASA video (http://www.youtube.com/watch?v=3f_21N3wcX8), the libration of the moon is clearly shown. Libration means the wobbling, and the moon has longitudinal and latitudinal libration. You can achieve the same affect by hanging a ball from a string, and shaking the string a little. The moon always has one side facing the earth and scientists call this tidal locking. They explain it using only the force of gravity. However, the really fascinating thing is the rotational libration. Even more amazingly, it also stays the right way up, rotating back and forth. Scientists say this is caused by something similar to the earth having seasons as it rotates around the sun. But this is not the same kind of movement. Scientists say that the gravitational effect of the tides is enough to contain the huge oscillation of the moon. But, this cannot exert enough force because its a tiny anomaly in earths gravitational shape – the shape of which has since been found to be ‘like a potato’.
I propose that the libration of the moon is not caused by gravitational effects, but by electromagnetism. The moon is a permanent magnet, its rock being magnetized in the same way as Earth rocks. It oscillates about a position fixed by much stronger electromagnetic forces. Measurement of the moons magnetic field show that is is much weaker than that of the earth, but present.
The magnetic property of rocks is familiar on earth. In the past, the same source of energy that still keeps the earth molten on the inside also kept the moon molten. Being smaller, the moon cooled down earlier and solidified. It solidified in the presence of the earths magnetic field, which caused the crystals of rock to magnetically align. This is a well known effect in rocks on earth and is widely accepted. The best example is the seabed rocks adjacent to mid-ocean ridges. As the rock parts, new lava rises and cools. The crystals align with the earths magnetic field as they solidify. The rock records the direction of the magnetic field at the time of solidification.
Bands of oppositely orientated magnetic alignment show that the earths magnetic field flips with some regularity, with a hundred thousand or more years between events. These magnetic ‘stripes’ indicate the earths magnetic field has flipped many times in the distant past. This idea is also supported by the rapid acceleration of the north magnetic pole toward Russia, over the last few decades. Some people feel the earths magnetic field will flip within years from now, yet there is no way to predict it as there is no recorded precedence.
The moon, being a magnet, aligns with the earths electromagnetic field. It is this force that holds the moon in place, not the gravitational affect of tides. Also, the rotation of the moon is locked to the earths magnetic field. The electromagnetic ‘poles’ of the moon align with the earths poles.
This proposal for the mechanism of locking the orientation of the moon to the earth implies an interesting prediction. When the poles of earths magnetic field eventually flip again, it will be followed closely by the orientation of the moon, which will not stay the ‘right way p’, but ‘turn on its head’. The same side will continue to face earth, but it will be upside down. If this actually occurs, it would more than adequately show that magnetism is the cause of the moons locked orbit.