Photo of a large 3D printed model of the ESO Extremely Large Telescope, showing the back of the dome.
https://mediacdn.aus.social/media_attachments/files/116/559/381/590/211/829/original/9af6db6d023d8ea3.jpeg
If you have a 3D printer that you're not using (or, better yet, several of them) and you're looking for a project, here's an Extremely Large one for you: a printable 3D model of @esoastronomy's Extremely Large Telescope, https://www.eso.org/public/products/models3d/ELT-3D-Print-model/
There are a *lot* of parts, many of which are small and intricately detailed. It would be a time consuming challenge to print and assemble, but it must be possible because there are photos of the resulting model bundled with the STEP file.
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