Answer: The referred to verse does not provide a scientific explanation of the
phenomenon of the solar system or anything else. Rather it only communicates
that the sun cannot leave its path and the night cannot come earlier even a
split second of its prescribed time.
The words ‘each swims along in [its own] orbit’ is not a very accurate
translation of the Arabic words: ‘كُلّ فِي فََلَك يَسْبَحُوْن’
The word ‘فََلَك’ means ‘a prescribed path’ – which
may be circular, ovular, longitudinal or of any other shape. It would be
pertinent to point out here that science has proved that sun together with other
heavenly bodies of the solar system is moving ahead in a straight line.