25 Years Ago, Voyager 2 Captures Images of Neptune
NASA's Voyager 2 spacecraft gave humanity its first glimpse of Neptune and its moon Triton in the summer of 1989. This picture of Neptune was produced from the last whole planet images taken through the green and orange filters on the Voyager 2 narrow angle camera. The images were taken on Aug. 20, 1989, at a range of 4.4 million miles from the planet, 4 days and 20 hours before closest approach on Aug. 25.
http://www.nasa.gov/content/25-years-ago-voyager-2-captures-images-of-neptune/
25年前 海王星とトリトンをボイジャー2号が撮影
1989年8月20日海王星の440万マイル上空から撮影
その4日と20時間後に最接近
http://www.nasa.gov/sites/default/files/thumbnails/imageneptune_full.jpg