| always looking in
We are always looking backward in time throught the channels of our memory lanes. When we observe the nightsky of stars or looking through the most powerful optical telescopes or listening with the most sensitive radio telescopes, we are merely looking and listening the past.
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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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