How many sidereal year in 1 millennium? 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 millennium The SI base unit for time is the second. 1 second is equal to 3.1687536047488E-8 sidereal year, or 3.1709791983765E-11 millennium. 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 millennium = 0.001 millennium
10 sidereal year to millennium = 0.01001 millennium
50 sidereal year to millennium = 0.05004 millennium
100 sidereal year to millennium = 0.10007 millennium
200 sidereal year to millennium = 0.20014 millennium
500 sidereal year to millennium = 0.50035 millennium
1000 sidereal year to millennium = 1.0007 millennium
You can do the reverse unit conversion from millennium 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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