Convertir year (sidereal) en secondes

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Vice versa: secondes en year (sidereal)

Year (Sidereal)

La sidereal year is the time it takes Earth to complete one full orbit environ the Sun relatif à the fixed stars, as opposed to the tropical year qui is measured against the vernal equinox. Because of the precession of the equinoxes, the sidereal year is slightly longer than the tropical year. One sidereal year est égal à approximativement 365.25636 days. 


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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