Mechanical Properties of Lunar Regolith Quotation
"I'm at the foot of the ladder. The LM footpads are only
depressed in the surface about 1 or 2 inches, although the surface seems to
be very, very fine-grained, as you get close to it, it's almost like a
powder; down there, it's very fine ... I'm going to step off the LM now.
That's one small step for (a) man. One giant leap for mankind. As the --
The surface is fine and powdery. I can -- I can pick it up loosely with my
toe. It does adhere in fine layers like powered charcoal to the sole and
sides of my boots. I only go in a small fraction of an inch. Maybe an
eighth of an inch, but I can see the footprints of my boots and the treads
in the fine sandy particles."
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Tranquility Base (Apollo 11), July 20, 1969
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