But… they are not to scale!
The orrery is named after after Charles Boyle, Fourth Earl of Orrery (1676-1731), for whom one was made. I always wondered…
If you want a proper scale model, visit Boston. The Museum of Science has one. Earth and Mars are a few blocks from the planetarium; distances go up rapidly from there.
Are those really kinetic though?
OK - a boingy tongue twister:
wearable orrery, wearable orrery, wearable orrery…
Does this put anyone else in mind of the Crownstar Addendum necklace in Against a Dark Background by Iain M. Banks? I wonder if the jeweler read that book.
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