Changes

==Origin==

==Origin==

[https://nordan.daynal.org/wiki/index.php?title=English#ca._1100-1500_.09THE_MIDDLE_ENGLISH_PERIOD Middle English], from [https://nordan.daynal.org/wiki/index.php?title=English#ca._600-1100.09THE_OLD_ENGLISH.2C_OR_ANGLO-SAXON_PERIOD Old English] ''dūst''; akin to Old High German ''tunst'' storm, and probably to [[Latin]] ''fumus'' smoke

[https://nordan.daynal.org/wiki/index.php?title=English#ca._1100-1500_.09THE_MIDDLE_ENGLISH_PERIOD Middle English], from [https://nordan.daynal.org/wiki/index.php?title=English#ca._600-1100.09THE_OLD_ENGLISH.2C_OR_ANGLO-SAXON_PERIOD Old English] ''dūst''; akin to Old High German ''tunst'' storm, and probably to [[Latin]] ''fumus'' smoke

*[http://en.wikipedia.org/wiki/12th_century before 12th Century]

*[https://en.wikipedia.org/wiki/12th_century before 12th Century]

==Definitions==

==Definitions==

*1: fine [[particles]] of [[matter]] (as of [[earth]])

*1: fine [[particles]] of [[matter]] (as of [[earth]])

:b : [[confusion]], disturbance

:b : [[confusion]], disturbance

==Description==

==Description==

'''Dust''' consists of particles in the [[atmosphere]] that come from various sources such as [[soil]] dust lifted by [[weather]] (an [http://en.wikipedia.org/wiki/Aeolian_processes Aeolian process]), [http://en.wikipedia.org/wiki/Volcanic_eruptions volcanic eruptions], and [[pollution]]. Dust in [[homes]], offices, and other human environments contains small amounts of [[plant]] [http://en.wikipedia.org/wiki/Pollen pollen], human and animal hairs, textile fibers, paper fibers, [[minerals]] from outdoor [[soil]], human skin cells, burnt meteorite particles and many other [[materials]] which may be found in the local environment.

'''Dust''' consists of particles in the [[atmosphere]] that come from various sources such as [[soil]] dust lifted by [[weather]] (an [https://en.wikipedia.org/wiki/Aeolian_processes Aeolian process]), [https://en.wikipedia.org/wiki/Volcanic_eruptions volcanic eruptions], and [[pollution]]. Dust in [[homes]], offices, and other human environments contains small amounts of [[plant]] [https://en.wikipedia.org/wiki/Pollen pollen], human and animal hairs, textile fibers, paper fibers, [[minerals]] from outdoor [[soil]], human skin cells, burnt meteorite particles and many other [[materials]] which may be found in the local environment.

Cosmic dust is widely present in [[space]], where gas and dust clouds are primary precursors for [http://en.wikipedia.org/wiki/Planetary_systems planetary systems]. The [http://en.wikipedia.org/wiki/Zodiacal_light zodiacal light], as seen in a dark [[night sky]], is produced by [[sunlight]] reflected from particles of dust in [[orbit]] around the [[Sun]]. The tails of [[comets]] are produced by emissions of dust and ionized gas from the body of the comet. Dust also covers solid planetary bodies, and vast dust storms occur on Mars that cover almost the entire planet. [http://en.wikipedia.org/wiki/Interstellar_dust Interstellar dust] is found between the [[stars]], and high concentrations produce [http://en.wikipedia.org/wiki/Diffuse_nebulae diffuse nebulae] and [http://en.wikipedia.org/wiki/Reflection_nebulae reflection nebulae].

Cosmic dust is widely present in [[space]], where gas and dust clouds are primary precursors for [https://en.wikipedia.org/wiki/Planetary_systems planetary systems]. The [https://en.wikipedia.org/wiki/Zodiacal_light zodiacal light], as seen in a dark [[night sky]], is produced by [[sunlight]] reflected from particles of dust in [[orbit]] around the [[Sun]]. The tails of [[comets]] are produced by emissions of dust and ionized gas from the body of the comet. Dust also covers solid planetary bodies, and vast dust storms occur on Mars that cover almost the entire planet. [https://en.wikipedia.org/wiki/Interstellar_dust Interstellar dust] is found between the [[stars]], and high concentrations produce [https://en.wikipedia.org/wiki/Diffuse_nebulae diffuse nebulae] and [https://en.wikipedia.org/wiki/Reflection_nebulae reflection nebulae].

Dust is widely present in the [[galaxy]]. Ambient [[radiation]] heats dust and re-emits radiation into the microwave band, which may [[distort]] the [http://en.wikipedia.org/wiki/Cosmic_microwave_background cosmic microwave background] power spectrum. Dust in this regime has a complicated emission spectrum, and includes both thermal dust emission and spinning dust emission.

Dust is widely present in the [[galaxy]]. Ambient [[radiation]] heats dust and re-emits radiation into the microwave band, which may [[distort]] the [https://en.wikipedia.org/wiki/Cosmic_microwave_background cosmic microwave background] power spectrum. Dust in this regime has a complicated emission spectrum, and includes both thermal dust emission and spinning dust emission.

Dust samples returned from [[outer space]] may provide [[information]] about conditions in the early [[solar system]]. Several spacecraft have sought to gather samples of dust and other materials. Among these craft was [http://en.wikipedia.org/wiki/Stardust_(spacecraft) Stardust], which flew past [http://en.wikipedia.org/wiki/Comet_Wild_2 Comet Wild 2] in 2004, and returned a capsule of the comet's remains to Earth in January 2006. In 2010 the Japanese [http://en.wikipedia.org/wiki/Hayabusa_(spacecraft) Hayabusa] spacecraft returned samples of dust from the surface of an [http://en.wikipedia.org/wiki/Asteroid asteroid].[http://en.wikipedia.org/wiki/Dust]

Dust samples returned from [[outer space]] may provide [[information]] about conditions in the early [[solar system]]. Several spacecraft have sought to gather samples of dust and other materials. Among these craft was [https://en.wikipedia.org/wiki/Stardust_(spacecraft) Stardust], which flew past [https://en.wikipedia.org/wiki/Comet_Wild_2 Comet Wild 2] in 2004, and returned a capsule of the comet's remains to Earth in January 2006. In 2010 the Japanese [https://en.wikipedia.org/wiki/Hayabusa_(spacecraft) Hayabusa] spacecraft returned samples of dust from the surface of an [https://en.wikipedia.org/wiki/Asteroid asteroid].[https://en.wikipedia.org/wiki/Dust]

[[Category: Earth Science]]

[[Category: Earth Science]]

[[Category: Astronomy]]

[[Category: Astronomy]]