period of time in astronomy | Crossword Clue

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Answer

Clue

Relevancy

epact

Clue

Period of time, in astronomy

Definition

the difference in days between the lunar and solar year

solarday

Clue

24-hour period, in astronomy

epoch

Clue

Moment in time, in astronomy

Definition

an important period of time, also EPOCHA

aeon

Clue

A billion years, in astronomy (Var.)

Definition

the largest division of geological time, composed of several eras, also EON

albedo

Clue

Light ratio in astronomy

Reflectivity measure, in astronomy

Concept in astronomy

Definition

(Latin) the measure of the reflecting power of an object

almagest

Clue

Work on astronomy

Definition

(Arabic) a medieval treatise on astrology and alchemy

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