Last Updated：2025/11/23

(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

Source Word

galactic year

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.

Japanese Meaning

銀河年：太陽系が銀河系の中心を一周するのにかかる時間で、約2.25〜2.5億年と推定される周期。

太陽系が天の川銀河の中心を一周するのに要する約2.25億〜2.5億年の間に、太陽系は銀河のさまざまな領域を通過し、それが地球の気候に地質学的時間で影響を与える可能性がある。

Sense（1）

(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.

Sense（2）

(astronomy) by extension, the time it takes a celestial body to complete a quasi-orbit in a galaxy

galactic years

（ plural ）