Question:
why does the lenght of days and nights on earth varies at different times of the year?
dan_cious
2006-02-20 04:59:25 UTC
why does the lenght of days and nights on earth varies at different times of the year?
Two answers:
hound9_4
2006-02-20 05:16:31 UTC
As the earth journeys arond the earth on its orbit, sometimes the northern hemisphere is tilted more towards the sun, and sometimes the southern hemisphere is tilted more towards the sun.



If your hemisphere is tilted more towards the sun, then you will have longer days and shorter nights. If your hemisphere is tilted away from the sun, then you will have shorter days and longer nights.



The tilting is caused because the earth's rotational axis is not orthogonal to the plane of its orbit, called the ecliptic.
theonlyrealj
2006-02-20 05:03:00 UTC
It's due to the tilt of the earths axis, which oscillates during the year. The shortening and lengthening of days is a direct consequence of the varying seasons. In short, the longer the exposure to the sun, the higher the daytime temperature will be and the shorter the lower.


This content was originally posted on Y! Answers, a Q&A website that shut down in 2021.
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