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To: Cincinatus
...and FYI, Gold was right about the surface of the moon being covered with fine dust, and his theory was proven again when NEAR Shoemaker landed on the asteroid Eros.

From NASA's website on the history of the debate

"...Now let me turn to Gold' s deep dust model. If one actually reads what Gold said in his paper (Gold, 1955, Mon. Not. Roy. Astr. Soc., 115, 585), rather than what some NASA geologists say he said, one finds that it is a carefully reasoned, logical model that was fully consistent with the observations known at that time. Gold argued that (1) the Moon had always been a cold body, (2) the craters were of impact origin, (3) the maria were deposits of material eroded from the surrounding highlands and carried into depressions by an electrostatic transport process, and (4) there was a darkening process operating on the lunar surface that lowered the albedo of material exposed at the surface This model was considered to be a less likely but, nevertheless, credible possibility by most persons outside the NASA Astrogeology group, including Harold Urey, a Nobel Prize winning scientist and the father of modern planetary and meteorite chemistry.

...The notion that the maria deposits were so unconsolidated that a spacecraft would sink out of sight in them was not a part of the original model, nor was it essential to it...

...At the time we published the paper, we considered it to be a significant breakthrough because it showed that the Moon had a fine powdery surface. Of course, after the Apollo landings everyone said that they knew all along that the lunar surface was covered with a fine-grained regolith (e.g., Wilhelms, To a Rocky Moon). However, actual accounts from that period tell a rather different story. Gene Shoemaker was quoted in an article in National Geographic (circa 1963) as saying that the surface was covered with cobbles (fist-sized chunks of rock). I still have a copy of the cover of the Houston telephone directory (circa 1964), which was a NASA publicity photo showing a spacesuited astronaut walking on the NASA geologists' best guess of the Lunar surface: volcanic ash consisting of centimeter-sized rocks. Following the Soviet Luna 9 landings, Gerard Kuiper, the preeminent planetary astronomer of his time, held a news conference in which he proclaimed that the surface was obviously volcanic aa lava, adding that this would "tear an astronaut's boots to shreds". Even after the unmanned Surveyor landings on the moon, the NASA geologists continued to insist that the regolith was course-grained.

...Finally, it should be emphasized that many aspects of Gold's model are correct, after all. The craters are of impact origin. While the maria did turn out to be lava flows, the flow surfaces are buried under several meters of dust. There are, indeed, erosional and depositional processes operating on the lunar surface, including electrostatic levitation, although these processes are not as efficient as Gold hypothesized. And there is ample evidence for his predicted darkening process, which today is called "space weathering". I think it is time for the devil to be given his due."

131 posted on 11/20/2001 9:47:17 AM PST by spycatcher
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To: spycatcher
Gold was not right about the lunar surface -- he hypothesized that fine dust, electrostatically levitated, flowed from the highlands downhill, into the maria, creating giant "dust bowls." This is not the way the Moon is put together -- the highlands have a completely different composition than do the maria and the mare dust cannot be derived from the highlands as Gold's model holds. Moreover, Gold predicted kilometer thicknesses of dust -- the debris layer at the Apollo 11 site is on the order of about ten meters thick.

No one prior to Apollo predicted a bare lava surface on the Moon -- this was well known from the diffuse reflection of the sunlight off the Moon, which indicated a ground-up, powdery surface. The dynamics of soil formation by grinding up the surface rocks was accurately modeled and predicted by Gene Shoemaker (for whom the NEAR mission was named), in contra distinction to Gold's model.

Gold will not admit that he was wrong about the Moon and still believes the same silly story he believed before we went to the Moon with the Apollo missions. Other scientists who were wrong, like Harold Urey, admitted this fact after Apollo, to their everlasting credit. Gold, like the crank he is, refuses to admit error.

134 posted on 11/20/2001 10:06:09 AM PST by Cincinatus
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