Longtime Slashdot reader fahrbot-bot shares a report from Gizmodo: A team of researchers think they’ve discovered a cave on the Moon in radar images of the lunar surface, which they posit could be a future site for an established human presence on our rocky satellite. The tunnel is in the Mare Tranquillitatis (Sea of Tranquility) pit, the deepest known pit on the Moon. (If the name is familiar to you, the Sea of Tranquility is where the Apollo 11 mission landed in 1969.) The pit formed due to a lava tube’s roof collapse or a collapse of a void structure created by tectonic processes. To look for potential cave structures within the pit, the researchers studied side-looking radar images taken by the Lunar Reconnaissance Orbiter’s Mini-RF instrument between 2009 and 2011. The team then conducted 3D radar simulations of potential geometries of the pit and its cave, to determine that

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