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Thursday 17 October 2013

EARTH YEARS

Did you know?
The earth year can be measured in several ways,

1.Tropical Year(365.242 days):
Gotten from the measurement of the time taken for the earth to round the sun and come back to its former inclination to the sun.


2.Sidereal Year(365.256 days):
Time taken for earth to cross the star rising behind our sun.(Refer to the image below)


3. Anomalistic Year(365.260 days):
Time it takes the earth to make its closest approach to the sun on its elliptical axis.

So far, the most popular is the tropical year which determines weather and climate.

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