libration

n.

振动，天平动；

Die Äquilibration der kognitiven Strukturen
The free precession and libration of Mercury
The control and use of libration-point satellites
Large Longitude Libration of Mercury Reveals a Molten Core
Large longitude libration of Mercury reveals a molten core.
Rotational predissociation and libration in the infrared spectrum of ArHCl
Trajectories and Orbital Maneuvers for the First Libration-Point Satellite
Regulation, Governance and Regulatory Collibration: achieving an “holistic” approach
Dynamics and mission design near libration points. Vol. 1: Fundamentals: The case of collinear libration points
On the use of a sunward libration-point-orbiting spacecraft as an interplanetary magnetic field monitor for magnetospheric studies