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## Main Question or Discussion Point

hi

if gravity is a force of attraction ,a natural question arises ,why it can't be repulsive?as there is a great symmetry in the structure of universe,i think we cannot take the case of attraction for granted.And with this reasoning, for surely gravity must not be a force but something else.GR gives an exact alternative by defining gravity as the path followed by a body in the spacetime curvature caused by a massive object.even though the case is like this why we still treat gravity as one of fundamental forces?why we still try to make a new theory by combining relativity and quantum theory?

and one more question ,by relativity theory,nothing can exceed speed of light,then how long will take for earth

to know the absence of sun,from the moment sun is removed from its position?

thanks.

if gravity is a force of attraction ,a natural question arises ,why it can't be repulsive?as there is a great symmetry in the structure of universe,i think we cannot take the case of attraction for granted.And with this reasoning, for surely gravity must not be a force but something else.GR gives an exact alternative by defining gravity as the path followed by a body in the spacetime curvature caused by a massive object.even though the case is like this why we still treat gravity as one of fundamental forces?why we still try to make a new theory by combining relativity and quantum theory?

and one more question ,by relativity theory,nothing can exceed speed of light,then how long will take for earth

to know the absence of sun,from the moment sun is removed from its position?

thanks.