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In astronomy, spinning dust emission is a mechanism proposed to explain anomalous microwave emission from the Milky Way. The emission could arise from the electric dipole of very rapidly spinning (10–60 GHz) extremely small (nanometer) dust grains as suggested by Bruce T. Draine and Alex Lazarian in 1998, most likely polycyclic aromatic hydrocarbons. The anomalous emission was first discovered as a by-product of Cosmic Microwave Background observations which make very sensitive measurements of the microwave sky which have to identify and remove contamination from the galaxy. The smallest dust grains are thought to have only hundreds of atoms.

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  • Poussière tournoyante (fr)
  • Spinning dust (en)
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  • In astronomy, spinning dust emission is a mechanism proposed to explain anomalous microwave emission from the Milky Way. The emission could arise from the electric dipole of very rapidly spinning (10–60 GHz) extremely small (nanometer) dust grains as suggested by Bruce T. Draine and Alex Lazarian in 1998, most likely polycyclic aromatic hydrocarbons. The anomalous emission was first discovered as a by-product of Cosmic Microwave Background observations which make very sensitive measurements of the microwave sky which have to identify and remove contamination from the galaxy. The smallest dust grains are thought to have only hundreds of atoms. (en)
  • En astronomie, la poussière tournoyante est un modèle d'explication des rayonnements irréguliers de micro-ondes provenant de la Voie lactée, et même au-delà. Ces émissions résulteraient de décharges électriques au sein d'une nuée de grains de poussière très fine (chaque grain a 10-50 atomes de large) tournant à une très grande fréquence (10–60 GHz). La découverte des rayonnements résultat d'observations précises du fond diffus cosmologique en vue d'identifier et expliquer toute source d'émission galactique. (fr)
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  • En astronomie, la poussière tournoyante est un modèle d'explication des rayonnements irréguliers de micro-ondes provenant de la Voie lactée, et même au-delà. Ces émissions résulteraient de décharges électriques au sein d'une nuée de grains de poussière très fine (chaque grain a 10-50 atomes de large) tournant à une très grande fréquence (10–60 GHz). La découverte des rayonnements résultat d'observations précises du fond diffus cosmologique en vue d'identifier et expliquer toute source d'émission galactique. D'abord, on considéra l'émission irrégulière de micro-ondes comme une concordance statistique surprenante entre les variations de micro-ondes et l'infrarouge lointain. Ce signal provenant de la poussière fut beaucoup plus fort qu'attendu, s'il provenait du rayonnement blanc. (fr)
  • In astronomy, spinning dust emission is a mechanism proposed to explain anomalous microwave emission from the Milky Way. The emission could arise from the electric dipole of very rapidly spinning (10–60 GHz) extremely small (nanometer) dust grains as suggested by Bruce T. Draine and Alex Lazarian in 1998, most likely polycyclic aromatic hydrocarbons. The anomalous emission was first discovered as a by-product of Cosmic Microwave Background observations which make very sensitive measurements of the microwave sky which have to identify and remove contamination from the galaxy. The smallest dust grains are thought to have only hundreds of atoms. (en)
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