The eighth and most distant planet from the sun, Neptune, reaches opposition with the sun on Sept.23, when it will be in its best position for viewing for the year. Neptune is too faint to see with ...
Why it's so special: Only one spacecraft has ever visited the eighth and most distant planet from the sun. On Aug. 25, 1989, NASA's Voyager 2 spacecraft took the first-ever close-up images of Neptune.
Despite the lack of a dedicated mission to the planet, scientists have learned plenty through ground observations and space telescopes Shi En Kim - Reporter A photo of Neptune, taken by the Voyager 2 ...
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