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mean solar day

/miːn ˈsəʊlə deɪ/

Traduction: Journée moyenne basée sur le mouvement apparent du Soleil, servant d'unité standard de 24 heures pour le temps civil.

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/miːn ˈsəʊlə deɪ/C1formalscientific
  • frJournée moyenne basée sur le mouvement apparent du Soleil, servant d'unité standard de 24 heures pour le temps civil.

The average length of a day based on the Sun's apparent motion across the sky, used as the standard 24-hour time unit for civil timekeeping.

  1. Average length of a dayC1formal

    The average time it takes for the Earth to complete one rotation relative to the Sun, equal to 24 hours.

    frjour solaire moyen

    • The mean solar day is divided into 24 hours of equal length.
    • Astronomers use the mean solar day to standardize timekeeping.
    • The length of a mean solar day is slightly longer than a sidereal day.