Dust

Dust is a general name for minute solid particles of diameters less than 500 micrometers (otherwise see sand or granulates) and, more generally, for finely divided matter. On Earth, dust occurs in the atmosphere from various sources: soil dust lifted up by wind, volcanic eruptions, and pollution are some examples; airborne dust is considered an aerosol and can have a strong, local radiative forcing on the atmosphere and significant effects on climate. Dust is also widely present in outer space (see interstellar dust and Zodiacal light), where gas and dust clouds are primary precursors for planetary systems.

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The physical behavior of dust follows laws that are not always comparable with that of solid or fluid matter. For example, the pressure on a box full of dust need not be uniform (See physics of granulate matter for explanation).

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Solid: A solid is a phase of matter characterized by resistance to deformation and to changes of volume....

Diameter: For the geometric term, see diameter....

Matter: Matter is commonly referred to as the substance of which physical objects are composed. In physics, it is everything that is constituted of elementary fermions. Philosophically, matter constitutes the formless substratum of all things, which exists only potentially and from which reality is produced...

Dust related Images and Photos (experimental)

Red Dust (DVD)	Gold Dust	Gold Dust	Gold Dust
Diamond Dust Shoes	Blue Fairy Dust	Excuse My Dust (DVD)	Drop Of Dust
Ask The Dust	Diamond Dust Shoes 1980 (Lilac Blue Green)	Red Dust Jean Harlow Clark Gable 1932	Excuse My Dust (1951)