As probes that we build travel farther, won't more problems occur? For example, as the nuclear energy thing (RTG) it goes on gets weaker over time. Or, solar panels will receive less light. Or even, the delay between Earth and the satellite communication. Are there any probes that address some of these issues? Are there any planned probes in the future to go interstellar?
As satellites travel further from the sun, available solar energy decreases proportional to the square of the distance. This means that satellites we build for much operation past Mars require supplemental energy sources, such as thermonuclear generators.
Right now, if we were to build something for interstellar travel, we'd either need a fission reactor onboard, a very, very large thermonuclear generator, or very deep sleep cycles. We'd also need a mechanism for generating the required thrust, and a way to shed it upon arrival at a target. The short answer: we're not quite ready.
I'm not aware of any planned or even announced interstellar satellite or probe missions.