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We will learn about the 1971 5 launches to the planet Mars: Mariner 8, Mars 2, Kosmos 419, Mars 3, and Mariner 9.
Previous video in this series can be seen at:
https://youtu.be/rFOzh6X1D4c
Next video in this series can be seen at:
https://youtu.be/c-7JDbYcBu4