陶哲轩: 如何丈量宇宙
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Re: 陶哲轩: 如何丈量宇宙
好多人都知道,在地球上肉眼看到的太阳和月亮它们几乎一样大 -- 虽然太阳的直径是月亮的 400 多倍。陶哲轩在上面这个视频中也提到了这一有趣而怪异的巧合 (视频 11:32 开始)。这难道是巧合吗?这是巧合吗?这么巧吗?这么巧?
The sun and the moon are about the same size when you look at them in the sky, though that's just thanks to the coincidence that the sun is about 400 times farther away than the moon and also about 400 times bigger.
https://www.britannica.com/video/size-s ... s%20bigger.
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Re: 陶哲轩: 如何丈量宇宙
夏至那天太阳照不到井底?掐指一算,地球的半径就出来了。
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