year

(redirected from sidereal year)
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Related to sidereal year: tropical year, anomalistic year

year

(yēr),
An approximately 365-day period, the time the earth takes to revolve around the sun.
[O.E. gēar ]
References in periodicals archive ?
This work is regarded by the author as of profound significance, and relates to analogous sidereal year, lunar month, and solar day, periodicity in properties of radioactive decay of Pu-239, observed and reported by S.
Some of the date drift is due to the precession of the Earth's axis, which shifts the calendar with respect to where the Earth is located in its orbit (that is, the sidereal year is 20 1/2 minutes longer than the tropical year, an excess that accumulates to 14 1/2, days in 1,000 years).
Determination of the yearly periods with the accuracy of 1 h also yielded two peaks: one equal to 365 average solar days (calendar year) and another equal to 365 days plus 6 h (sidereal year).