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Originally Posted by stuart Okay, to expand on what I said before (no pun intended) - and remember this is just what I'm remembering from undergraduate classes - the idea is that the "fabric of space" can be thought of as a 3-D cartesian (let's ignore hyperbolic and parabolic geometries for now) grid. This grid is iteself expanding. So, let's say our group of galaxies were placed at the origin, point (0, 0, 0). Let's say that another group of galaxies is placed at point (1, 1, 1). The physical distance between those two points is found to be 1 Mpc (mega parsec). Many years later, the relative velocities between the two objects were not enough to alter their positions on the grid, so they are still at (0, 0, 0) and (1, 1, 1). However, the expansion of the grid itself has made that physical distance be 2 Mpc.
That's the situation I'm describing. That's why Earth still orbits the Sun, the Sun the Galaxy, and so on. As to what the "fabric of space" actually is and how objects are "attached" to a given location in it, that's where I get fuzzy and it could be what you were saying above, with it being an incommplete theory and more of a construct for how stuff works. |
You are describing objects that are not moving relative to one another though, but just that the space between them is increasing. That still doesn't explain how a body moves
through space at any given time, as the space between it and other objects isn't the point, but that it stays the same distance from an object but is still moving relative to other objects such as Earth to Sun.
Thus it can be concluded from my POV that their is not physical attachment to objects/bodies to space, but that a
force is the cause for action of observation between bodies in space. Perhaps this force propagates at different speeds throughout space which gives it separate amounts of force on objects, e.g special motions. As we have no detection of it yet it may have propagated much faster in our "neck of the woods" so to speak then others making it very weak but still explaining expansion. Of course everyone reading this should note that this is purely speculation, as we know as much about space as why light travels at C in space.
I may be missing something big here, if I am speak up and let me know...sometimes I bottle neck my thought patterns.
