Due to mass Space time curves. Consider the case of sun & earth. Sun,since it is heavy will curve the space more than earth.isn't it? Then how come the sun and earth are being pulled towards each other with same force? The earth has to straighten the curve (caused by sun)first,and then has to curve it in opposite direction ,so that it can pull the sun towards it .Or the space time is curved between the two bodies? could anybody explain?