Lunar cave entrance?
December 2, 2013
My latest favorite image is this collapsed roof of a lunar lava tube. This photo put my imagination to work. The camera is pointed down at almost the same angle as the sun, illuminating a portion of the floor. Debris, perhaps the roof, can be seen where it fell eons ago. The exposed lava tube became two cave entrances, perhaps appropriate for human shelter. Several of these pits have been found in various sizes of openings and depths.
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