1. apparent oscillating movements of the moon as seen from Earth, allowing observation of slightly more than half its surface over time
Usage: astronomy
2. oscillating or balancing movements in general
Usage: technical

Examples

• The moon’s librations allow us to see about 59% of its surface from Earth.
• Astronomers study lunar librations to better understand the moon’s motion.
• The telescope captured the subtle librations of the celestial body.
• These librations occur due to the moon’s elliptical orbit and tilted axis.
• The spacecraft’s librations were carefully monitored during the mission.
• Scientists measured the librations to calculate orbital mechanics.