Convertir second (sidereal) en secondes

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Vice versa: secondes en second (sidereal)

Second (Sidereal)

La sidereal second is one sixtieth of a sidereal minute, or 1/86,400 of a sidereal day — the period of Earth's rotation relatif à the distant stars. Il est the smallest standard subdivision of sidereal time and is utilisé en high-precision astronomical computations. One sidereal second est égal à approximativement 0.99727 SI seconds. 


seconde

La second (symbol: s , abréviation: sec ) is the unité de base de temps dans le Système international d'unités (SI) (SI) (French: Système International d’unités), couramment understood and historiquement défini comme 1/86400 of a day – ce factor derived from the division of the day first into 24 hours, then to 60 minutes and finally to 60 seconds each. Analog clocks and watches souvent have sixty tick marks on their faces, representing seconds (and minutes), and a "second hand" to mark the passage de temps in seconds. Digital clocks and watches souvent have a two-digit seconds counter. La seconde is aussi part of several other units of measurement like meters par seconde for velocity, meters par seconde par seconde for acceleration, and cycles par seconde for frequency. 


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