on this date in 1989, the voyager 2 spacecraft (shown passing saturn) made its closest approach to neptune, the last planet visited before leaving the solar system. the voyager program is arguably the most successful unmanned mission in NASA history, alongside the pioneer program. both sets of spacecraft continued to return monumental streams of data on our solar system and beyond, well past their intended mssions. long may they sail !!!
Excessively well engineered and operated.
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