Crossword puzzle clue "astronomy unit"

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Here are the possible solutions for astronomy unit clue

Answer
Clue
Relevancy
eon
Clue
Unit in astronomy
Definition
a long period of time, also AEON
parsec
Clue
Astronomy unit
Definition
a unit of astronomical distance
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
Ptolemy's work on astronomy
Definition
(Arabic) a medieval treatise on astrology and alchemy

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