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Japan’s Kaguya (SELENE) orbiter confirmed the existence of a massive underground cave, or lava tube, on the Moon in 2017, following its initial discovery of a vertical pit (skylight) in 2009. Located in the Marius Hills region, the cave is roughly 50 km (31 miles) long and 100 meters wide, offering potential shelter for future lunar bases
How long until 
"A million deaths are not enough for Master Rahool."
(Hello fellow guardian, either current or previous)
That's where they hid the props and catering equipment after staging the moon landing
They hired Stanley Kubrick to fake the moon landing in 1969, but since he was a real stickler for authenticity, he filmed it on location.
I don't understand the dimensions. If it's 100m wide (I assume the diameter of it as seen from the top) then what is 50km long ? is it 50km deep ? I don't think so we wouldn't see the bottom of it sunlit. So what is it ?
Its tube shaped, parallel to the surface. Not just the hole in the picture
oh ok I understand now. Cheers
Brings the meaning of mooning to a new level.
Little late for a Moonfall ad campaign