Can the first law of motion be related to Gravity? (.. if mass is just a space's contraction, and that contraction is less evident the farther, is comprehensible why, when we have two bodies, they try to get closer. think in some ball in a pool. in there the pressure varies depending how deep it is. Pressure on down side of the ball is higher than on the up side. then the ball goes up. Something similar happen with gravity. out side of "the couple of bodies" space is softer than center side, then bodies goes in becouse they are high density space ..) When a body is moving, it compress the space in front there is a diference between the space behind and in frot wich holds motion as we see
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