Since the big bang, the universe is expanding, it doesn’t mean new space is being inhabited that was previously empty, its the existing space spreading out. How measurable is this on the human scale (meaning human dimensions and human timeline)?
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I mean, I’m expanding a little, but that has more to do with my workout habits and diet.
When you hear about the universe expanding, generally we’re talking about galaxies being carried away from one another. Within a galaxy, internal gravitational forces are more than counterbalancing the universe’s overall expansion. The universe’s expansion is something that happens at the very largest scales; if we could only see our own solar system, or even just our own galaxy, we wouldn’t have evidence to suggest the overall universe was expanding.
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