Definition, Meaning & Synonyms

libration

Noun

lɪˈbreɪʃən

Definition

The oscillating movement of a celestial body, such as the Moon, allowing it to display slightly more than half of its surface from Earth.

Examples

The libration of the Moon allows astronomers to study 59% of its surface over time rather than just 50%.
During certain libration phases, the Mare Tranquillitatis becomes more visible from Earth.
Libration can be observed during lunations when the Moon appears to sway back and forth in orbit.

Meaning

Libration refers to a phenomenon seen in astronomical objects where the apparent position of a body oscillates, resulting in a view that reveals slightly more of its surface over time.