Examples from the Web for libration
For other worlds, we usually have to rely on other data: fluctuations in gravity, or the gentle rocking motion known as libration.
The authors of the new study used data from the Cassini probe orbiting Saturn to measure the libration of Mimas.
The one on the left illustrates the manner in which the libration in longitude is made apparent.
A list of some of the principal astronomical researches of Lagrange and Laplace:—Libration of the moon.Pioneers of Science|Oliver Lodge
The admirable memoir of Lagrange upon the libration of the moon seemed to have exhausted the subject.Biographies of Distinguished Scientific Men|Francois Arago
We'd show enough, however, to make it damned impressive, and explain it by libration of the satellite.Question of Comfort|Les Collins
The last of Galileo's great astronomical discoveries related to the libration of the moon.Great Astronomers|R. S. Ball