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Pocono Mountain Observatory

The Pocono Mountain Observatory is a privately owned facility             
           located in the heart of the Pocono Mountains PA.

Mariner 4, first Mars flyby, 1965.

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Saturday July 14, 2018 All Day
Annually on July 14

Mariner 4, first Mars flyby, 1965.

http://en.wikipedia.org/wiki/Mariner_4