First a true-false question. Are the furthest visible galaxies presently incapable of any connection with us. That is, the light coming from them 'now', is incapable of reaching us, ever, and vice versa. If this is true, and I assume it is then has there ever been an estimate of where the present cut-off point is i.e. how many billion light years away is this sphere of visible, out of touch, galaxies.-trivia really. Upon reflection the true false answer would be false. Eventually the light would reach us but so red-shifted we couldn't detect it- if mankind still existed mega billion years in the future.