History always repeats itself I think it was there to show how many times humans had made it to the moon over a very long time. Noticed how drastically the mountains change with every next image. It could indicate how many times they have been wiped from existence only to wait say a million years maybe more to be born into existence or I guess maybe the ghosts could revive everyone and their memories could be wiped so they basically start over. This is why I think the stranger knows your every move because she's seen you over a couple hundred maybe thousand times.