Crossword puzzle clue "light ratio in astronomy"

Here are the possible solutions for light ratio in astronomy clue

Answer
Clue
Relevancy
albedo
Clue
Light ratio in astronomy
Light reflection ratio
Astronomer's light ratio
Planetary reflected-light ratio
Reflectivity measure, in astronomy
Concept in astronomy
Definition
(Latin) the measure of the reflecting power of an object
aeon
Clue
A billion years, in astronomy (Var.)
Definition
the largest division of geological time, composed of several eras, also EON
almagest
Clue
Work on astronomy
Definition
(Arabic) a medieval treatise on astrology and alchemy

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