Mountains Around the Sea of Tranquility: Mare Tranquillitatis ...
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Thu, 29 Jul 2010 19:20:27 +0200 (News) - Mountains Around the Sea of Tranquility: Mare Tranquillitatis is where humans first landed on the Moon on, July 20, 1969. Lunar Orbiter 3, February 20, 1967 (Photo Credit: NASA RPIF; Kinetikon Pictures)
