The satellite traces the same analemma once each sidereal day.
A mean solar day is, therefore, nearly 4 minutes longer than a sidereal day.
It also fixed the number of days in each month, which previously varied by year with the sidereal zodiac.
Should we really consider two corresponding sections of the same scale as exactly equal to one another: two sidereal days, for example, as exactly equal intervals of time?
We divide this unit of time - the so-called sidereal day - into 24 hours, the hour into 60 minutes, the minute into 60 seconds.
Of these the more noteworthy dealt with the distribution of stars, star clusters and nebulae, and the construction of the sidereal universe.
Moon is said to have 27 (not 28) wives with whom he stays for one day in a sidereal lunar month.
It uses lunar months and solar sidereal year.
