gdpudasaini said:
Earth is rotating because the Earth was formed out of rotating cloud of gas before 5 billion years
this theory is known as the nebular hypothesis ; it was first put forward in substantial detail by the german philosopher immanuel kant in 1755 .
quote : “In the current notion … space is completely empty , or at least as good as empty ; thus [space] must have been … filled with sufficient capable [reads rotating] matter [before] to transfer the movement on all heavenly bodies found [in space] … and after the attraction had cleaned the said space and had gathered all extended matter in specific chunks [reads formation of planets] : thus the planets had from then on to continue their circling with
the once expressed movement [my emphasis] in a space without friction free and unchanged .” (Kant's 1755 article available at
www.mala.bc.ca)
comment : without taking anything away from this achievement , kant’s way of thinking suffers from metaphysical underpinnings prevalent in his day ; a process is understood by identifying a primordial origin which is then understood to explain the whole process , rather than studying the process in the entirety of its determinations (oops , old word) ;
example to clarify comment : if I throw a rubber ball against an outside wall , it jumps back at me without me thinking that at the moment of contact both the rubberball and the wall gave way ; it bounces back behind me and I leave it , months later I pick it up in the long grass and notice that the rubber ball , having been exposed to the sun’s heat has cracks in it ; it is somehow difficult for me to see that these cracks were already beginning to form that first time I threw the shiny ball against the wall ;
comment 2 : kants notion of space as empty , or as good as empty , and of movement in a space without friction can be concretised in the light of the work of Planck and Einstein ;
comment 3 : as a starting point : try an imagine that the planets on the one hand do not circle the sun on the other extreme , but rather , in the light of the material properties of the sun’s particles & waves being right around is , that the planets are circling inside the sun ; this not the way I would put it ,but , as starting point : try and imagine that we are still inside a rotating gas cloud
question : it has been said in the discussion here that the Earth is getting heavier because of its relation to the sun ; I would really be interested to know more about this aspect . . .