Galactic-year Definition
noun
(astronomy) The time it takes for the Solar System to orbit around the center of the Milky Way Galaxy, estimated to be from 225 to 250 million years.
Wiktionary
(astronomy) By extension, the time it takes a celestial body to complete a quasi-orbit in a galaxy.
Wiktionary
Other Word Forms of Galactic-year
Noun
Singular:
galactic-yearPlural:
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