solar year

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Related to solar year: sidereal year

tropical year

tropical yearclick for a larger image
The period between two successive vernal equinoxes, the time the earth takes to complete one orbit around the sun relative to the first point of Aries. Its length was 365 days 5 h 48 min and 45.19 s in 2000, and it is changing by 0.00000006162 x y days (y in Julian years from 2000), or about 5 milliseconds/year. The tropical year differs from the solar year by 1 part in 26,000, since this is the period of the earth's precession about its rotational axis combined with the precession of the perihelion of the earth's orbit. Also called an astronomical, equinoctial, natural, or solar year. It contains one complete cycle of seasons.
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References in periodicals archive ?
Eventually the Greeks adopted a more accurate period known as the Metonic cycle, which equates 19 solar years with 235 lunar months.
TEHRAN (FNA)- Authorities in Afghanistan's Nangarhar province said nearly 2,000 militants have been killed in the ongoing Solar year which is going to be ended in few days.
The Islamic calendar is a lunar calendar, and is 11 to 12 days shorter than the solar year.
The director said: "Since technical preparations for most of the 46 schools have already been completed, we request the Ministry of Education to launch work on them as soon as possible." Bara Khan, head of the Paktika Students' Association, said the authorities had promised to build the schools by the end of the last solar year .
TAHRAN (CyHAN)- Iran's non-oil goods trade balance including condensate, has faced a $5.433 billion deficit for the first 11 months of the current solar year (started on March 21, 2013), the Iranian Custom Administration reported on Feb.
Songkran, the most widely celebrated festival in Thailand, is a Sanskrit word which means the "beginning of a new solar year".
The shortest day of the year often falls on December 21, but this year the Druid and Pagan community marked the first day of winter yesterday because the modern calendar of 365 days a year - with an extra day every four years - does not correspond exactly to the solar year of 365.2422 days.
"It happens at about the same time every solar year, so it corresponds to the seasons, and it provides them a good fixed date," he added.
Also as the Muslim year is shorter than the Solar year, the date is different each year, some years there are two festivals in one (Gregorian) calendar year.It one of the two major Islamic festivals - both of which are called Eid ...
Today the Gregorian calendar is known to be 26 seconds a year out of synch with the solar year and both Russia and Iran have since introduced more accurate ones.
The red celebration on the last Wednesday of the solar year is welcomed always and forever among Iranians.

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