voyager 1 is 11.7billion miles away and voyager 2 is 9.5 billion miles away because it took a different route. pretty big numbers but to put it into perspective, voyager is traveling at 17 kilometers per second and it first took off 36 years ago. it has took that long to go 11.7billion miles away. it has just reached interstellar space meaning it has left the part of space which has no affect by our sun or any other star
we sent a probe to pluto which is 4.67billion miles at the furthest and the closest its 2.66billion miles. more likely they sent it at its closest approach and it took them 9.5 years to get there travelling at 30,000mph lol