Girard-Perregaux 1966 Minute Repeater, Annual Calendar and Equation of Time (Photo courtesy of Girard-Perregaux) ... The astronomical dial shows sidereal time, ...

Thus, when we take the universe at large as some fixed entity, with respect to that entity, the earth completes an exact 360° rotation in an average time of only 23 Hours, 56 Minutes, 4.091 Seconds ...

To measure and display the running equation of time that enables instant reading of solar and civil times, Vacheron Constantin has specially developed a tropical gear train that emulates the ...

Simply put, a sidereal year – it’s pronounced sy-dear-ee-al, by the way, despite being spelled side-real – is the amount of ...

Sidereal time (left) is measured with respect to background stars while solar time references the Sun. Earth needs to rotate nearly an extra degree for the Sun to pass the reference point; ...

A sidereal day is approximately 23 hours, 56 minutes and 4.1 seconds. ... The equation of time. Calendar. Perpetual calendar. The days of the month. The days of the week. The months.

A sidereal day is approximately 23 hours, 56 minutes and 4.1 seconds. ... The equation of time. Calendar. Perpetual calendar. The days of the month. The days of the week. The months.