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  • Writer's pictureSeb Falk

Medieval (g)astronomy: my PhD in biscuit form

Updated: May 13, 2020


I submitted my PhD thesis last week (and now have a little more time to post on this blog).  In large part it’s a study of this fascinating instrument.

If you've read this blog before, you'll know I've studied a 1950s replica of this equatorium, made my own replica - and then made it again in a smaller form and (slightly) more authentic materials.







But until now, I’d never made an edible equatorium.


I made the face out of chocolate shortbread (an adaptation of Jamie Oliver’s recipe, with 3 tbsp of cocoa added per equatorium).  The epicycle was gingerbread.


It was a bit tricky to get everything the right shape, and the gingerbread expanded more than I had expected in the oven, but it all came out pretty well…









Add a screw and nut to hold the rule to the epicycle, position them correctly, and here’s your complete equatorium!

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