Newton's laws of motion and laws of gravity are the base of the motion or objects, etc. However, Newton’s laws break down at high speeds and/or in quantum, so you have to use relativity and quantum theory, which are theories by the way. We know that gravity breaks down at quantum to, so not you have to look at string theory, which is more philosophical than theory. Finally, unless I am forgetting something, I think there is a super string theory too. Now, motions that approach speeds where Newtonian laws break down, general relativity must be used, but that is based off of gravity, in which gravity breaks down in quantum mechanics.<br /><br />So now we have in quantum mechanics, smaller particles traveling at various velocities, in which both general relativity and Newton’s laws break, so we use quantum theory. It is unfortunate that gravity is not understood, because it is a major roadblock, with respect to our forward momentum. Once we figure out what gravity, anything will be possible. We will be able to solve our energy issues, make alternative propulsion systems, and go zipping around the solar system like really, really, fast. Do I have evidence? Well, yes, I imagine I do. Can I prove it, if I had access to a lab? Yes, I most definitely can. Can I do the math? Yes, eventually, but it is really time consuming, because it takes time from my thinking time. It is very frustrating...<br /><br />The voyager craft should be getting pretty far out there; I bet they are no where near where they are supposed to be. Eventually, something as simple as a candle flame will move voyager.