The Great Dark Spot on Neptune
A) has been visible through telescopes as far back as 1665.
B) disappeared sometime between the Voyager 2 flyby and when the Hubble Space Telescope photographed Neptune in 1994.
C) was the short-lived result of a comet crash in 1995.
D) came into existence sometime between the Voyager 2 flyby and when the Hubble Space Telescope photographed Neptune in 1994.

Question

Quizplus · Accepted Answer

The Great Dark Spot was visible during the Voyager 2 flyby in 1989 but had disappeared by the time the Hubble Space Telescope photographed Neptune in 1994, suggesting that it was a short-lived weather phenomenon rather than a permanent feature.