Question: how long would it take to get to the farthest planet?
Answer: Voyager 1, Earth's most distant spacecraft, left the solar system and entered interstellar space in 2012. According to NASA, it is currently speeding away at 38,200 mph. For Voyager 1 to travel 39 light-years, it would take the spacecraft 685,000 years. But Voyager 1 isn't going there anytime soon, or ever.