Libration is a 9 letter English word. It's valid Words with friends word worth 14 points.
You can make 447 anagrams from letters in libration (abiilnort).
1595-1605; Latin lībrātiōn- (stem of lībrātiō) a balancing. See librate, -ion
The one on the left illustrates the manner in which the libration in longitude is made apparent.
We'd show enough, however, to make it damned impressive, and explain it by libration of the satellite.
One more astronomical discovery also he was to make—that of the moon's libration.
The authors of the new study used data from the Cassini probe orbiting Saturn to measure the libration of Mimas.
A list of some of the principal astronomical researches of Lagrange and Laplace:—libration of the moon.
For other worlds, we usually have to rely on other data: fluctuations in gravity, or the gentle rocking motion known as libration.
But it is only an insignificant margin of the far side of the moon which this libration permits us to examine.
The admirable memoir of Lagrange upon the libration of the moon seemed to have exhausted the subject.
The last of Galileo's great astronomical discoveries related to the libration of the moon.