Back in the 1960s, NASA had a real concern that the lunar surface might be covered in a thick layer of fine dust—
some scientists speculated it could be meters deep, like a cosmic quicksand pit. The fear was that the first lunar lander, specifically the Apollo 11 Lunar Module,
would touch down and just sink out of sight, swallowed up by this powdery mess. It wasn’t a baseless worry either—early theories about the Moon’s surface came from limited data, and some astronomers, like Thomas Gold, argued that billions of years of micrometeorite impacts could’ve pulverized the surface into a deep, fluffy dust layer.
The concern stemmed from how little they knew. Telescopic observations couldn’t resolve fine details, and the Moon’s low gravity (one-sixth of Earth’s) meant dust might not compact like it does here. If it was loose and deep, the lander’s legs could’ve plunged right through, tipping it over or stranding it. Engineers even designed the Lunar Module with wide footpads to spread its weight, just in case.
Yeah, even back then, a lot of folks at NASA thought Tom Gold was nuts. The Surveyor lander in ‘66 put all the fears to rest. The surface was go for landing!