Last Updated
：2025/11/23
galactic year
（ plural ）
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(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.
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galactic year
Over the course of a galactic year, the Solar System passes through different regions of the Milky Way, which may influence Earth's climate over geological time.
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Over the course of a galactic year, the Solar System passes through different regions of the Milky Way, which may influence Earth's climate over geological time.
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