Are you sober yet?<quoted text>
I'm going to speak real slow. See if you can keep up and understand what I am explaining.
I posted that animated link demonstrating what a barycenter is. It was a large circle being orbited by a smalll circle, representing two bodies of mass which then wobbled due to them orbiting the center of gravity between them. They are the same mass, but portions separated by distance. Keep in mind that is a most significant aspect of the whole phenomenon of existence, but I will not try to explain it now.
This distance between sections of mass creates that center of mass that both bodies spin about. This is where the "attractive forces" of each cancel each other out and they become one, so to speak, to other distant bodies, which are all parts of the same original mass. To a third object, you have a gravitational force between it and those two separately, however the orbiting varies it on a periodic basis. But the barycenter is more stable because it is in the middle. But as the gravity force pulls everything closer together, these distances close, thus increasing the cumulative force in all relationships. The barycenter moves closer as the periodic variation of the orbiting bodies does too.
This happens on the atomic scale. This is how gravity becomes additive with mass. However, you have other forces at work keeping them from colliding, such as the EM skin. You wind up with a ball of matter compressed as tight as it can be without going nuclear. Fusion, fission, etc. All from this relatively close contact between mass particles. This is a 3D process, happening in all directions except the surface, where it is down, sideways, with the potential of acting on far distant objects upwards.
You can call that earth if you wish.
You have other bodies formed from the same process scattered around the universe. Like asteroids, planets, stars, etc. They have this same surface potential as the earth, but due to distance, this potential is felt only from the direction those objects face each other, and a cross sectional factor is introduced because of the sizes of the bodies involved. The gravitational attraction is more like a beam now than the all encompassing activity of the ball that formed from roughly the same process on the aomic scale.
As creatures formed on the surface of this ball, their molecular construction was guided by the relatively strong force of this ball, which as I mentioned works downward and sideways. All of the gravity beneath your feet are beams similar to between those distant objects, but it is concentrated and magnified because of that 3D action of those barycenters. All of the ground you see below the horizon on this ball is also working on you. When you leave the planet, you are existing and being continually rebuilt outside the design you were created in. This is a relatively slow process, but essentially foreign and incomplete materials are now being manufactured by your body for replenishment. Your body has to have the existing gravity field and signature to manufacture the products needed. It doesn't magically produce that from within. Those beams from space are insufficent not so much because they are beams, after all, some are strong enough to hold this solar sytme in orbit, but in the local redistribution. The angles it works from. You will run into the same problem with centrifuges because they are very directional.
Until you can unify gravity and EM, which can be done, you don't want to leave far from home for very long. It will be a one way trip.