Translation of "light hour" into French

heure-lumière is the translation of "light hour" into French.

light hour noun

the distance light travels in a vacuum in one hour; approximately one billion kilometers

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  • heure-lumière

    noun

    Only four light hours from Earth is the planet Neptune and its giant satellite, Triton.

    A seulement quatre heures-lumière de la Terre, la planète Neptune... et son satellite géant, Triton.

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