Serious question: How far away can these explorers get but we are still able to receive the images? They must be sent as radio waves, microwaves, etc. but without repeaters spaced out along the way what is the max range? It just seems hard to believe that something can be billions of miles away and we can still receive a signal from it.
Voyager 1 is 13 light hours away from teh Sun and we are still getting data back.