Surely this apparent movement is due to the rotation of the Earth. The angle between sun and Earth does not change significantly. Obviously the fact that the Earth's orbit around the sun is not circular changes the angle through the year, but your 1 sec interval is not going to mark a significant difference to that.
I didn't introduce Earth there it was a blank empty piece of space? If you want something there lets put a neutron particle there as it will provide almost no other interactions. Sorry I only used earth/sun as a distance because I know you knew the time of flight of light. Sorry my for my bad English again, I concentrate on the translation so much I lost what I meant.
So the point is a blank empty piece of space yet the gravity field must reflect every gravity attraction from every point in the universe and it must go up and down.
