This might be a strange question, but I really am trying to figure out exactly what gravity is. It's a force I know, but has no kind of physical manifestation. It's just there... So my question is does rotation have anything do do with gravity? I've read that Venus has a slower rotation than earth but has the same gravitational pull or something of the sorts. That's fine but why do celestial bodies rotate? I have a theory(which is what I gather is the same as Einstein's) that massive bodies create dents in space-time. From what I understand Einstein only talked about revolution of bodies, but space is 3 dimensional. I think Neptune(maybe Uranus can't remember) rotates on a y axis vs x like most bodies(I suppose that depends upon your perspective), but ultimately why do bodies rotate? It also seems the more mass a body has the faster it rotates, i.e. stars. Maybe it's as simple as collisions causing the rotation, but I personally think that gravity has to take part in this.... The idea I have is that all objects are like a whirl pool in water, sucking things in. Except in 3 dimensions vs the "two" (although arguably a whirlpool does act in three) am I completely ridiculous or dumb in this evaluation? Gravity is the one thing we know a lot about, but still don't have any idea what it exactly is. It's a Force, and I put it that it's because whatever object happens to be in space creates a 3d whirlpool in space-time attracting anything towards it. I don't know maybe I am just restating what Einstein had in mind, but if any could clarify this for me I would be ever so grateful. It's pretty much the oldest force we as a species have been aware of yet we still don't have any definitive explanation for it. Thoughts, articles, and insights are gladly appreciated. I hope i'm not the only one confused by this concept. On a final concern where everything gets crazy is on the molecular level, why do electrons revolve around nuclei? is it gravity? That the nucleus causes a gravitational cavity electrons want to fill, but because of the repulsion can't? Universal theory of everything, gravity has to be the key.... In my personal opinion... it's the only constant.