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Incidentally, last night I learned something I'd always wondered about when I was younger: that the equatorial diameter of the Sun is, in fact, about 400 times the diameter of the Moon, a ratio that then leads to one of astronomy’s most spectacular quirks – because the distance between the Earth and the Sun is almost 400 times the distance between the Earth and the Moon, the Moon and the Sun appear almost exactly the same size in Earth’s sky and therefore when the Moon and the Sun line up perfectly, as seen from Earth, something wonderful happens: a total eclipse of the Sun. How magical is that.