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Why are interstellar dust particles hard to locate?

April 26, 2017dust hard interstellar locate particles

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Why are interstellar dust particles hard to locate?

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A. Interstellar dust particles are tiny, the largest measuring only a few microns in diameter. Because of this they penetrate only a short way beyond the surface of the collector tiles, where the aerogel is creased and cracked after 7 years in space. So, the interstellar dust grains are few, tiny, and hidden among a host of aerogel cracks and flaws. Finding them will not be easy.