Last Updated：2025/11/28

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

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light day

Source Word

light day

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

Japanese Meaning

光が1日に進む距離

The spacecraft covered a light day during its accelerated transit.

その宇宙船は加速航行中に光が1日で進む距離を移動した。

Sense（1）

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

light days

（ plural ）