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Please excuse the obscurity of the question but say there are two spheres: sphere A has a radius of 1 metre and sphere B has a radius of 2 metres. Both sphere have super- luminous velocites (they are both exactly c/H metres from us) and due to the extent of their velocities they will begin to fade. My question is that will both spheres "fade away" simultaneously or will sphere A "fade away" before sphere B or vice versa?