I-convert seconds i-convert araw (sidereal)

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Vice Versa: araw (sidereal) i-convert seconds

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The <b>second </b> (symbol: <b>s </b>, abbreviation: <b>sec </b>) is the base unit of time in the International System of Units (SI) (French: Système International d’unités), commonly understood and historically defined as 1/86400 of a day – this 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 often have sixty tick marks on their faces, representing seconds (and minutes), and a "second hand" to mark the passage of time in seconds. Digital clocks and watches often have a two-digit seconds counter. The second is also part of several other units of measurement like meters per second for velocity, meters per second per second for acceleration, and cycles per second for frequency. 


Araw (Sidereal)

The <b>sidereal day</b> is the period of Earth's rotation measured relative to the <b>distant stars</b> rather than the Sun, making it slightly shorter than the solar day. It is the true rotational period of the Earth and is fundamental to astronomical coordinate systems and telescope tracking. One sidereal day equals approximately 23 hours, 56 minutes, and 4.091 seconds (86,164.091 s). 


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