dust
  • Dusty material is common throughout the observable universe. It is present in our immediate astronomical area, accounting for much of the mass of comets and producing meteor showers. On a larger scale are dust clouds in galaxies with masses many hundreds of times that of the Sun, either dark, or glowing from stellar radiation. Dusty areas of galaxies also seem to be the seats of star and planet formation, so that dusty material may be the original form of most of the matter around us.

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