This libration can be stable for less than 100 million to billions of years.

This form can be identified (at least approximately) as libration.

The study was conducted inside the interval where libration happens.

In this position it is subject to libration, which can limit observation.

However the visibility of this formation can be affected by libration.

It can also become hidden from sight due to the effects of libration.

The libration of the planet was more pronounced than we had assumed originally.

In addition, libration effects can completely hide this crater from view.

This part of the surface is also subject to libration, and the crater can sometimes be completely hidden from view.

It does wobble about its mean position a bit as a result of libration, but not by anything near that much."

Other observations suggest they move around the libration points in ellipses of about 6 by 2 degrees.

To the man who followed, it must have appeared as though libation had induced libration.

During its construction, the starship held steady in the libration point leading the moon.

The visibility is also affected by libration, which can completely conceal this formation from view.

Because of libration, you can see 59% of the Moon from the Earth.

Libration is the sort of jiggling effect you get when you see the Moon.

"If I only knew how far the libration extends," Bell murmured.

Due to libration this feature can sometimes be observed from the Earth under favorable lighting conditions.

It can also become hidden from sight due to libration, or brought into a more favorably viewing position.

The maps used orthographic projection of the surface as viewed at mean libration.

Behind the destroyer the flagship immediately sought coverage within the libration zone.

Because of an unusually high libration, the twilight zone between eternal night and day was 80 kilometres.

Drop me off at a libration point, Jeanie.

Vasili has pointed out that it must be taking some positive action, to remain here at the unstable libration point.

From the Earth this crater appears foreshortened, and visibility can be affected by libration.