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.

However, both the Moon and Mimas experience libration wobbling slightly and bringing part of the “far side” into view.

To see how a global ocean could affect libration, take two bottles, fill one with sand and the other with water, then spin them.

But it is only an insignificant margin of the far side of the moon which this libration permits us to examine.

One more astronomical discovery also he was to make—that of the moon's libration.

Its rhythmic libration typified to him the principle of change in existence and of existence in change.

Here the honourable luminary gave a sort of modest libration, which convulsed the meeting with laughter.

At no time did Browning write verse which soars with a more steadfast and impassioned libration of wing.