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人类真是幸运。假如地球公转轨道椭率很大,当地球运动到远日点时,就是热带的气候也要变得比西伯利亚地区还冷;而当地球运动到近日点时,也许只有两极才能住人。可怕! 假如地球的自转轴不是与轨道面成恰到好处的66.5°角,而是处于极端。比如,自转轴与轨道面垂直,地球上就不会有四季更退,人类将生活在一个很缺乏“节奏”的星球上,而如果走向另一极端,自转轴与轨道面平行,地球上任何地点都会半年明,半年暗——这真是太糟糕了。假如地球再朝太阳靠得近些,地球的环境就不会比金星好到哪里去,而如果从现在的位置上“挪”远一些,地球上就会出现永久的冰期。假如地球表面没有厚厚的大气层,地球
Humans are really lucky. If the orbital ellipsoidal rate of the earth is large, when the earth moves to a farther day, the tropical climate will become colder than in Siberia, and when the earth moves to recent days, there may be only two poles to live. Terrible! If the Earth's axis of rotation is not exactly 66.5 degrees from the orbital plane, it is at the extreme. For example, if the axis of rotation is perpendicular to the orbital plane, there will be no retreat of the four seasons on Earth. Humans will live on a planet that lacks rhythm, and if they go to the other extreme, the axis of rotation is parallel to the orbital plane, and the Earth Any place on the site will be clear for half a year and dark for half a year - it's too bad. If the Earth is closer to the Sun, the Earth's environment will not be much better than Venus, and if there is a “near” distance from the current position, there will be a permanent glacial period on Earth. If there is no thick atmosphere on the Earth’s surface, Earth