Okay, say we are approx 32.6 light years from the supermassive black hole at the center of our universe. Surely then approx 75.2 years ago light left Earth traveling towards said black hole. A certain minute proportion of that light would have been sling-shotted around the black hole in just about every direction. Using the computational power available these days it should be possibly to calculate exactly where we should have to look to see the light returning from this round trip. Is it feasible that at some stage in the future we would be able to view this almost infinitesimally small amount of light and effectively watch earth 75.2 years ago? Is this far too simplistic? Am I being an idiot??