I just saw this thread and realized there's something like that up in Canada but much, much bigger! (I think it's in Toronto) There is a museum with a scale model of the sun and mercury at the edge of the museum's property. No big deal right? Well what they've done is set up the planets throughout the city to scale. You could go for miles and miles before you hit Pluto. I think the museum may be the ROM but...

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Quaeso quousque humi defixa tua mens erit? Nonne aspicis, quae in templa veneris?