George Hart and Elisabeth Heathfield’s Making Math Visible website, including instructions on making a model of our hyperboloid gates (designed by George and built collaboratively):
https://makingmathvisible.com/
Instructions:
https://makingmathvisible.com/Hyperboloid/Hyperboloid.html
And here is a short film George made about the gates in the UBC Orchard Garden:
https://www.simonsfoundation.org/2014/11/14/mathematical-impressions-curved-and-straight/
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We can track the path of the sun in the sky with our bodies, here in Vancouver at 49° North latitude, or wherever we happen to be!
Here’s a video of an activity like the one we are trying out today, and a handout from that workshop. Video direct link: https://youtu.be/ZZ0dlGvcpkM?feature=shared
Many thanks to astrophysicist and physics educator Benoit Pfeiffer for initiating this activity, and to UK mathematical artist Nick Sayers for teaching us how to do 6 month solargrams.
Here is Justin Quinnell’s how-to video on making a six-month pinhole camera: https://youtu.be/wtZOWEB_wcI?si=DivFPQSNCGD_viaB
… and a gallery of these kinds of images: https://www.brightonandhovenews.org/2015/06/10/pinhole-cameras-trace-ghostly-track-of-sun-across-brighton-and-hove-sky/
Below: Six month (solstice to solstice) pinhole camera solargram of the sky to the south of the UBC Orchard Garden, from summer to winter solstice.
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