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| Rollover joke - The Earth is, on average, located in the habitable zone, but at any given time it has a certain probability of being outside it, which is why life exists on Earth but is mortal. (Source - XKCD) |
See, it's funny because most of the time, the atom - particularly the Bohr model of the atom - is likened to the solar system with electrons following 'orbital' paths around the nucleus the way that planets follow similar paths around the sun.
As a chemistry teacher, I can say that it's much, much harder to come up with a similarly easily understood analogy for how electrons exist in the quantum mechanical model of the atom. There just isn't any sort of macroscopic thing that is anything like the quantum mechanical model of the atom.
And if the planets did move like electrons, that would be somewhat terrifying - especially as electrons can teleport from region to region a la an electron in a box.
Though I do have some evidence that the planets have a measurable spin, so there is that, at least.
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