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In the past workers were exposed to unacceptable levels of dust because the regulatory regime did not adequately address these issues . Hell , we could always kick up a bunch of dust into the atmosphere ( a little at a time or with a few nukes , your call ) . In this image , a young star is shown circled by full-sized planets , and rings of dust beyond . Most basic , says Kim , " is the question of separating a supernova 's intrinsic color from reddening by dust in the host galaxy or intervening space .