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A decade is a period of 10 years. The word is derived from the Ancient Greek: δεκάς (transliteration=dekas), which means a group of ten. Other words for spans of years also c ..more definition+
In relation to the base unit of [time] => (seconds), 1 Sidereal Years (Sy) is equal to 31558149.504 seconds, while 1 Decades (dec) = 315400000 seconds.| 821000 Sidereal Years | to common time units |
|---|---|
| 821000 Sy | = 25909240742784 seconds (s) |
| 821000 Sy | = 431820679046.4 minutes (min) |
| 821000 Sy | = 7197011317.44 hours (hr) |
| 821000 Sy | = 299875471.56 days (day) |
| 821000 Sy | = 42839353.08 weeks (wk) |
| 821000 Sy | = 821576.63441096 years (yr) |
| 821000 Sy | = 9858919.6129315 months (mo) |
| 821000 Sy | = 82147.243953025 decades (dec) |
| 821000 Sy | = 8214.7243953025 centuries (cent) |
| 821000 Sy | = 821.47243953025 millenniums (mill) |