How many sidereal year in 1 millennia? The answer is 999.29813679357. We assume you are converting between sidereal year and millennium. You can view more details on each measurement unit: sidereal year or millennia The SI base unit for time is the second. 1 second is equal to 3.1687536047488E-8 sidereal year, or 3.1709791983765E-11 millennia. Note that rounding errors may occur, so always check the results. Use this page to learn how to convert between years and millennia. Type in your own numbers in the form to convert the units!
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1 sidereal year to millennia = 0.001 millennia
10 sidereal year to millennia = 0.01001 millennia
50 sidereal year to millennia = 0.05004 millennia
100 sidereal year to millennia = 0.10007 millennia
200 sidereal year to millennia = 0.20014 millennia
500 sidereal year to millennia = 0.50035 millennia
1000 sidereal year to millennia = 1.0007 millennia
You can do the reverse unit conversion from millennia to sidereal year, or enter any two units below:
A sidereal year (from Latin sidus "asterism, star") is the time taken by the Earth to orbit the Sun once with respect to the fixed stars. Hence it is also the time taken for the Sun to return to the same position with respect to the fixed stars after apparently travelling once around the ecliptic. It equals 365.25636 SI days for the J2000.0 epoch.
A millennium is a period of time equal to one thousand years. There are two main viewpoints about naming millennia and there was a popular debate leading up to the celebrations of the year 2000 as to whether 2000 was the beginning of a new millennium. Historically, there has been debate around the turn of the millennium, centuries and decades before.
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