A celestial event is an astronomical phenomenon of interest that involves one or more celestial bodies. Examples of celestial events include the various phases of the Moon, meteor showers, comets, solar and lunar eclipses, planetary oppositions, conjunctions, and occultations.

https://en.wikipedia.org/wiki/Celestial_event

"As a professor of science, I assure you we did, in fact, evolve from filthy monkey-men."
Professor Farnsworth
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