Neptune Planet Image - Voyager 2’s Historic 1989 Capture #2027502 (License: Personal Use)

This historic image, taken by NASA’s Voyager 2 during its August 1989 flyby, reveals Neptune’s deep azure appearance caused by methane absorption in its upper atmosphere. Visible are faint cloud bands, high-altitude cirrus-like clouds, and the prominent Great Dark Spot-a high-pressure anticyclonic storm comparable in size to Earth, which later vanished by the time Hubble observed the planet in 1994. The image remains one of the most detailed views of Neptune ever obtained.

Used on astronomy education pages, NASA mission retrospectives, planetary science resources, and space enthusiast sites; serves users seeking authoritative visuals of outer solar system planets, especially for academic or科普 (science communication) purposes.