How should the hours be counted?
Depending on the region and culture, the beginning of the day has been defined as the moment when the Sun rises or when it sets.
August 7, 2024
Depending on the region and culture, the beginning of the day has been defined as the moment when the Sun rises or when it sets.
1. What is daytime? True solar day vs. mean day According to the simplest definition, the day is the period that separates two successive passages
We know that the days of the week correspond to the planets visible to the naked eye. Let’s start by clarifying a point of vocabulary: planet
In the geocentric system, which prevailed from the Babylonians to Copernicus, we distinguish two cycles of rotation: The diurnal cycle: all the stars revolve around
In French, there is no doubt from Monday to Friday: Lundi (Monday) Lunae dies Moon Mardi (Tuesday) Martis dies March Mercredi (Wednesday) Mercurii dies Mercury