The mysterious moon dust
President Bush puts dates to upcoming projects of space colonization, and it is exciting to imagine that all this will happen so soon. In 2015 set the beginning of lunar colonization, and by 2020 hope to have a permanent lunar base. And most striking, the first manned mission to Mars by 2030. So you have to take care of every detail, this time going to the moon to stay. A small but great detail in the moon mission is the subject of lunar dust. And the dust is problematic in itself is a big problem, as it is about the only thing found on the surface of the moon. is already provided in the reports of lunar missions from 1969 to 1972 that had the property Moondust if, say, uncomfortably sticky. Even more than when you leave the water on the beach and the sand sticks with you everywhere. The Apollo missions of that time could do little to prevent dust permeate all their tools and spacesuits. Everything was taken there from a brilliant white, reflecting almost all light that impinged. But to be impregnated with the dust-gray, and did not reflect much light, and the result was that the machine is heating up, with the obvious problems that entails.
In effect, what happens is that lunar dust is charged with static electricity, the same as we got the pen rubbed against the sleeve our shirt, which attracts small pieces of paper. But in this case, what "rubs" lunar dust is electrically charged? Nothing less than the sun's ultraviolet rays, effectively sweeping the electron layer is on the lunar surface. To wipe out the electrons (negatively charged), lunar dust is positively charged. Since all spots are positively charged, they repel each other. The result is that the thin outer layer of dust shoots up quite strongly in an arc of dust that rises miles above the surface of the moon. Nice to imagine, eh?
static electricity powder falling from the sky and rising from the ground. To what extent this factor may be negative for future missions? Mian Abbas's team has taken samples of lunar dust that got into the Apollo missions, and is studying pot to pot. Each speck of dust given to about 10 days of investigation. What they do is put it in a vacuum chamber so that the absence of air gives the speck-like behavior that was on the moon. The pot is already slightly charged when entering the chamber, so leave it suspended in a vacuum by means of magnetic fields. Then they affect a UV laser on the pot, to see if it is positively charged (like the sun's rays are the dust on the moon). The results to date break some theoretical models on the subject. Firstly it has been observed that ultraviolet light electrically charged lunar dust up to 10 times more than expected. It has also been seen that the larger spots are charged more than small, contrary to what was predicted. Yet unknown reasons for this behavior. The theory also predicts a "rain" of electrons in the "Night Moon", which negatively charged dust. The Apollo missions were only on the Moon during the "lunar day", but a permanent station will be day and night. So the second part of the study will bombard Abbas lunar dust with electrons, to predict how it would behave in the lunar night. Every detail in this regard may be very relevant.
- Technology News
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