But it does have a very big hole that might lead to underground tunnels.
Finding a hole in a rille could suggest that an intact tube lies beneath. So a group led by Junichi Haruyama of the Japanese Aerospace Exploration Agency searched for these "skylights" in images taken by Japan's Kaguya spacecraft, which orbited the moon for almost two years before ending its mission in June.
Deep cave
The team found the first candidate skylight in a volcanic area on the moon's near side called Marius Hills. "This is the first time that anybody's actually identified a skylight in a possible lava tube" on the moon, van der Bogert, who helped analyse the feature, told New Scientist.
The hole measures 65 metres across, and based on images taken at a variety of sun angles, the the hole is thought to extend down at least 80 metres. It sits in the middle of a rille, suggesting the hole leads into a lava tube as wide as 370 metres across.
Found: first 'skylight' on the moon
New Scientist, Space
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