如果地球的位置向旁边倾斜一点——像天王星一样，那么在夏至这天太阳会以更美的姿态出现在北极的天空中。

If the Earth were flipped sideways - like Uranus - the sun would be pretty much overhead at the North Pole on the June solstice.

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但是，直到1846年9月23日，德国天文学家约翰·加勒用望远镜在天空预计的位置搜寻并发现了一个微小的蓝绿色圆盘，海王星的存在才得到证实。

But Neptune's existence wasn't confirmed until September 23, 1846, when German astronomer Johann Galle used a telescope to search the predicted location in the sky and spotted a tiny blue-green disk.

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