Voyager2 is the only spacecraft that has done a close flyby of Neptune. Look at this badass photo of Neptune and its moon Triton from 1989. What a stunning capture! I think Voyager has been the most successful program by NASA.

Voyager2 is the only spacecraft that has done a close flyby of Neptune. Look at this badass photo of Neptune and its moon Triton from 1989. What a stunning capture! I think Voyager has been the most successful program by NASA.