As an object heats up it radiates heat, but it also generates an electric field near its surface as a result of the random thermal motion of its atoms.

物体温度升高后就会辐射出热量，但由于原子的无规则热运动，在物体表面附近还会产生电场。

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But the global temperature mainly depends on how much energy the planet receives from the Sun and how much it radiates back into space-quantities that change very little.

但是，全球气温变化主要在于太阳辐射量及地球对太阳辐射的反射量——这种量的变化十分微小。

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The higher the temperature of an emitting body, the faster it radiates infrared energy.

一个辐射体的温度越高，它辐射红外线能量就越快。

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Since the heat it radiates back into space depends on its temperature, the afternoon side of an asteroid radiates more heat than the morning side.

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"The first thing that happens when we add carbon dioxide into the atmosphere is it radiates some extra radiation back down to the surface, and we warm up a little bit, " Kirk-Davidoff says.

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To better predict the orbits of hazardous objects, this group is looking at the Yarkovsky effect, a force created when the asteroid absorbs sunlight and re-radiates it as heat.

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