Hi all its all one dimensional assumptions that one can shoot laser and the gravity (space time and escape velocity is light speed )pull is also light speed...so one would be travelling at a speed of light and shooting a laser means light can never go faster so speedy object see light from back ...while physics…

You are correct if you start from zero at neutron star you would be aged 10 and far away would be aged 12 .. neutron star is just a name you can consider it has massive body which slows time by 20% of earth time ... the best way ito know is time has different rates at different geo positions of universe ...so now is…

I mean light don’t have mass

Light cannot go through geodesic only accelerating particles can go in geodesic since light do have mass and always goes with constant speed ..it cannot go in geodesic naturally unless some one channelise it with dark matter like worm holes