as far as the speed of light goes I always thought it would interesting to do an experiment where, say a star a million light yrs away ( or shorter distance of course, but enough to make my point) has its light blocked. then take this blockage away. I predict that the light would not take a million yrs to get to us again. light and its speed are based on Earth experiments, assuming I'm right, the light from this particluar star would be instantaneous, when reaching us.

any reason I should be wrong?