Crossword puzzle clue "period of time in astronomy"

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Here are the possible solutions for period of time in astronomy clue

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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