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Join Date: Dec 2004
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Moondust is interesting stuff...

11/21/2005 1:43 PM

...Just ask Dr. Mian Abbas at the National Space Science and Technology Center in Huntsville, Alabama. He has been experimenting on single grains of moondust to determine what makes them so "sticky". Conventional wisdom is that ultraviolet light from the Sun knocks electrons out of dust granules, making them positively charged.

Using a UV laser on dust within a test chamber at 10-5 torr to simulate lunar vacuum, strange things happen.

"We've found two things," says Abbas. "First, ultraviolet light charges moondust 10 times more than theory predicts. Second, bigger grains (1 to 2 micrometers across) charge up more than smaller grains (0.5 micrometer), just the opposite of what theory predicts."

Don't feel like reading the whole article? Here's the audio from Science@NASA.

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