In summary, Voyager 1 and 2 have already left our solar system and are currently in interstellar space. They have traveled 13.8 billion miles and 11.5 billion miles, respectively, since their launch in 1977. Passing the heliopause is significant because it marks the end of the heliosphere and allows the spacecraft to study the interstellar medium. It is unlikely that they will encounter another star system, and we communicate with them using the Deep Space Network, which takes about 20 hours for signals to reach us from Voyager 1 and 17 hours from Voyager 2.
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brett812718
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will either of the voyager probes pass the heliopause before they run out of power. if so when will it happen?
Well this is a difficult question. First off no one knows how long their power supplies are going to last, seeing as they've already exceeded all expectations. Secondly, they may still have power, but not enough to transmit any useful data back. Wikipedia says Voyager 1 will reach the heliopause around 2015, so there's a good chance they will.
As for what will happen... I haven't the faintest.