Difference in the length of days
The length of days is different at different points of universe:
He arranges [each] matter from the heaven to the earth; then it will ascend to Him in a Day, the extent of which is a thousand years of those which you count…..Quran32;5
We are accustomed to thinking of a day as a period of 24 hours. However, that definition is a narrow one that only applies to our own planet. A day is the length of time it takes for a planet to complete one rotation on its axis – 360°. Since all of the planets rotate at different speeds, the length of a day on each one differs.
Mercury has a very long day. A day on Mercury takes 58 days and 15 hours in Earth days
A day on Venus is 243 Earth days.
Jupiter is the largest planet, and it also has the shortest day. It takes Jupiter only 9.9 Earth hours to complete a rotation
A day on Uranus only takes 17 hours 14 minutes and 24 seconds
It is an established fact that the length if days is different (with resepect to earth) at different points of universe and it is the fact which was revealed 1400 years back