My thoughts were about how far the gravity of earth would be felt, no matter how infinitesimal in degree. It seemed that since gravity is a force, then speed would not affect it. That's wrong though since gravity is a waveform and matches the speed of light. So, as stated, it could only be theoretically felt, around 4.5Bn light years away at most.
If you got that far away there would be no way to "report" your finding because it would take 4.5 billion years for the data to get back to earth????/ We would all be dead if the sun had not supernova-ed by then???Treblig (The Science Guy)