Last Updated：2025/12/07

(astronomy, physics) A unit of length equal to the distance light travels in one century.

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light century

Source Word

light century

(astronomy, physics) A unit of length equal to the distance light travels in one century.

Japanese Meaning

（天文学、物理学）光が1世紀（約100年）の間に進む距離。

One light century is an enormous distance compared to what we can traverse with current spacecraft.

光が1世紀に進む距離は、現在の宇宙船が移動できる距離と比べて非常に大きい。

Sense（1）

(astronomy, physics) A unit of length equal to the distance light travels in one century.

light centuries

（ plural ）