First, in case any of you don't know what librations are, I will copy a definition from the "World English Dictionary" (an on line dictionary) here:
World English Dictionary
|1.||the act or an instance of oscillating|
|2.||a real or apparent oscillation of the moon enabling approximately|
59 per cent of the surface
to be visible from the earth over a period of time.
|[C17: from Latin librātus, from librāre to balance]|
The moon is tidally locked to the earth, allowing us to see only one side of it. But because of its libration, or rocking from side to side, we can see much more of it over time. We can see from slightly different angles. But, only the astronauts have seen the "dark side" side of the moon, which, by the way is not always dark. People just started calling the other side, "the dark side" and it stuck. But although we know a lot about it, and men have walked on it, and left their junk sitting on it, it is still a romantic sight. Now, have a great day and don't spend too much time howling at the moon, you hear?