Context: Voyager 2 is the only spacecraft that has visited Neptune. The spacecraft's closest approach to the planet occurred on 25 August 1989. Because this was the last major planet the spacecraft could visit, it was decided to make a close flyby of the moon Triton, regardless of the consequences to the trajectory, similarly to what was done for Voyager 1's encounter with Saturn and its moon Titan. The images relayed back to Earth from Voyager 2 became the basis of a 1989 PBS all-night program, Neptune All Night.

Question: What is the only spacecraft to visit Neptune?
Answer: Voyager 2

Question: When did a spacecraft get closest to Neptune?
Answer: 25 August 1989

Question: What near Neptune did a spacecraft visit dangerously close?
Answer: Triton

Question: What program aired on PBS about Neptune?
Answer: Neptune All Night

Question:  What is the only spacecraft to never visit Neptune?
Answer: Unanswerable

Question:  When did a spacecraft refuse to get close to Neptune?
Answer: Unanswerable

Question:  What near Neptune did a spacecraft land on?
Answer: Unanswerable

Question:  What program aired on NBC about Neptune?
Answer: Unanswerable

Question: What aired in 1984?
Answer: Unanswerable