Astronomy is one of the more challenging topics to make accessible to students who are blind or visually impaired. The Star Coin project makes available 3D printable constellations that can be used to teach Astronomy.
The project started in October 2014 as an astronomy education approach for people with visual impairments. Creator Bruce Bream learned how to design and print two 3D objects over several months using FreeCAD and the MakerBot 3D printers at the Case Western Reserve University. He was also working as a volunteer in the astronomy department at the Cleveland Museum of Natural History (CMNH) at the time. The planetarium director, Jason Davis, mentioned their collaboration with the Cleveland Sight Center teaching astronomy. Putting this together with his recent 3D printing interest, it seemed like a great opportunity to print constellations in tactile form.