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.
Warning: it is not known for sure whether this instrument was actually used by the Vikings. Such an instrument would have been made of wood
There are situations in which using a magnetic compass is unreliable. This is the case inside a military vehicle (plane or tank). Indeed, the presence of continuous
Among the modern solar compasses used during the Second World War, it is undoubtedly the simplest and most effective model for this purpose. It is
Astronomical compasses were used by both sides during World War II, when other alternatives could not be used. For example, a magnetic compass can be
Instructions for use This GeoGebra animation replaces the reduction tables used in astronomical navigation. Step 1: Enter your estimated position Use the first two sliders:
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