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Physics
Special and General Relativity
Dark Energy vs Gravity: Expansion vs Contraction
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[QUOTE="asimov42, post: 5442993, member: 82651"] Hi all, A naive question: My understanding is that dark energy drives the expansion of space - that is, the distance between two points in space increases over time - with the important note that it is space [B]itself[/B] that is expanding. However, when talking about gravity (where one says that matter warps spacetime), the usual description is that gravity causes masses to move towards one another [B]through[/B] space. My question: if dark energy causes space itself to expand, shouldn't gravity have the opposite effect and cause space to contract, perhaps in addition to having masses move towards each other through space? I realize it would be more correct to talk about spacetime, but I'm wondering primarily about the spatial aspect. Thanks. [/QUOTE]
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Physics
Special and General Relativity
Dark Energy vs Gravity: Expansion vs Contraction
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