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When we move from here to there, we are actually traveling backward in time. So, when we reach our destinations, we reached them from a vantage point of the past not the future. We can only move backward in time and space not forward in time and space.
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Time independence: [∂E(g)]²=[∂F(a)×∂r(a)]·[∂F(b)×∂r(b)] and Mass independence: ¶a(t)·¶r(t)=c²
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