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1 фон
backgroundфон галактического излученияgalactic background emissionфон звездstar backgroundфон излученияbackground of (radio) radiationфон космического радиоизлучения1.background component 2.background noiseфон неба1.sky noise 2.background skyгалактический фон космический фон1.general cosmic noise 2.total sky noiseметагалактический фонbackground of extragalactic sources (of radioemission)непрерывный фонcontinuous backgroundнетепловой фонnonthermal backgroundтемный фон небаdark sky backgroundтепловой фонthermal background
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