如此接近,却又如此遥远 | 从国际空间站看到的地球 The Earth as seen from the International Space Station (© JSC/NASA) – 立刻壁应
立刻壁应必应壁纸20230104期


地球的近日点
今天是地球的近日点,由于地球绕太阳公转的轨道是椭圆形的,所以冬至后两周,地球距离太阳最近。你可能有疑问:地球离太阳最近的时候,为什么我们没觉得更热?其实,这是因为近日点的时候地球所接受到的太阳辐射只比平时强了大约7%,这种微小的差异对地球天气的影响并不大。
So close, yet so far. Earth at Perihelion
We’ve reached perihelion! Two weeks after winter solstice, the Earth’s orbit is closer to the Sun than at any other time of year – a result of the Earth’s elliptical orbit. You may think: ‘If we’re so close to the Sun, why can’t I feel the heat?’ Well, that’s because we’re only receiving about 7% more solar energy than normal, which doesn’t really have much impact on the weather.
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