Natural caverns occur on the moon in the form of ‘lava tubes’, which are the drained conduits of underground lava rivers.1 The exact dimensions of these lava tubes are yet to be investigated, but researchers estimate their widths to be tens to hundreds of meters, and the upper layer to be more than 10 meters thick.
Consequently, lava tubes interiors are expected to provide naturally protected environment from micrometeorites, cosmic rays and the extreme temperature differences between lunar day (~ 100 degrees C) and night (~ –173 degrees C).
"Skylight" entrance in the Sea of Tranquility (8.34°N, 33.22°W)
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- "Marius Hills Pit Offers Potential Location for Lunar Base." Solar System Exploration Research Virtual Institute. N.p., n.d. Web. 19 Aug. 2016.
- 2009), Possible lunar lava tube skylight observed by SELENE cameras,Geophys. Res. Lett., 36, L21206, doi:10.1029/2009GL040635. , et al. (
- Hong IS, Yi Y, Yu J, Haruyama J, 3D Modeling of Lacus Mortis Pit Crater with Presumed Interior Tube Structure, J. Astron. Space Sci. 32, 113-120 (2015). http://dx.doi.org/10.5140/JASS.2015.32.2.113