太阳温度连地球都晒热了,为什么地球外的太空是冰冷的? episode artwork

EPISODE · Nov 17, 2019 · 6 MIN

太阳温度连地球都晒热了,为什么地球外的太空是冰冷的?

from 天文随心听|讲述宇宙与人的故事

温度的本质其实是微观粒子的热运动的剧烈程度。太空并非是绝对零度的,而是2.7K,高于绝对零度2.7度。而由于太空十分的空旷,因此,太空实际上并不能显现出温度来。用低温灭火利用的原理是降低温度,隔绝空气。太阳利用的是核聚变反应,是在引力作用下实现的,和温度和空气无关。地球之所以能够接收到太阳辐射是距离不算太远,可以直接接受太阳辐射。

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太阳温度连地球都晒热了,为什么地球外的太空是冰冷的?

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