Hello. Why wouldn't the Earth gravitate towards the Sun? I have done some online research on this question and it appears that the reason is due to the Earth's rotation. I am not convinced and see no reason why that should be the reason. According to the Rutherford's model of the atom, an electron (which has a spin) would spiral towards the nucleus and it is only when Bohr came along with the Bohr's model that the problem was solved: that electrons could only orbit in certain orbits. Hence, it seems that this could be applied to the Earth-Sun model. Much help would be appreciated ^^. P.S. I have another question: why does the Earth rotate? Is there a reason for it or does it just happen naturally?