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How does spacetime curvature demonstration explain gravity using stretched cloth, a weight in center, a sphere at edge, spiraling inward, when the action is caused by downward pull of gravity? Celestial bodies doesn't have to interact with each other this way, when they warp spacetime fabric.

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How does spacetime curvature demonstration explain gravity using stretched cloth, a weight in center, a sphere at edge, spiraling inward, when the action is caused by downward pull of gravity? Celestial bodies doesn't have to interact with each other this way, when they warp spacetime fabric.	1