50. Only one spacecraft, the Voyager 2, has flown past Neptune. It happened in 1989 and captured the first close-up images of the Neptunian system. It took 246 minutes - four hours and six minutes - for signals from Voyager 2 to reach back to Earth.
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50. Only one spacecraft, the Voyager 2, has flown past Neptune. It happened in 1989 and captured the first close-up images of the Neptunian system. It took 246 minutes - four hours and six minutes - for signals from Voyager 2 to reach back to Earth.