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Tuesday, April 23, 2013

Comet ISON Could Dump Dust On Earth

Earth will be passing through the tail of the comet, should it survive it pass-by of the Sun. NBC News reports, however:

The particles are so small that even though they will hit the atmosphere at about 125,000 mph, instead of burning up, triggering so-called “shooting stars,” they will be stopped entirely, predicts astronomer Paul Wiegert, with the University of Western Ontario in Canada.

The only visible and detectable sign of the comet dust might be a proliferation of bright blue clouds at the edge of space. Scientists suspect these so-called noctilucent, or “night-shining” clouds are be seeded by dust in the upper atmosphere.

Eventually, the trapped comet dust will make its way -- silently and invisibly -- to the planet’s surface.

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