How to use Libration in a sentence
There is also a libration in latitude, arising from the fact that the axis of rotation of the moon is not precisely perpendicular to the plane of her orbit.
The capture clearly shows the libration spreading widening the signal (a clear tone would show up as a narrow line ).
If you would like to see a simulation of libration that really brings it to life then I recommend downloading Virtual Moon Atlas.
By De la Rue's advice, Pritchard began his career there with a determination of the physical libration of the moon, or the nutation of its axis.
His first important astronomical work was a careful investigation of the libration of the moon (Kosmographische Nachrichten, Nuremberg, 1750), and his chart of the full moon (published in 1775) was unsurpassed for half a century.Advertisement
The other side of the moon is therefore invisible from the earth, but in consequence of the libration about six-tenths of the lunar surface may be seen at one time or another, while the remaining four-tenths are for ever hidden from our view.