Hierarchy classification:

1. top of the aat hierarchies
2. Activities Facet
3. Events (hierarchy name)
4. events (activities)
5. natural events

Narrower term/s

• solar eclipses
• lunar eclipses

Anotations

Scope note:

Events that occur when three celestial objects become aligned, from the perspective of an observer. They are interceptions or obscurations of the light of the Sun, Moon, or other luminous heavenly body by the intervention of some other body, either between it and the eye or between the luminous body and that illuminated by it.