This is fantastic, and like another commenter mentions, a beautiful continuation of an age old practice: measuring the sky.<p>Very cool that their hardware keept chugging along for years without hiccup, too.<p>If you want to do something kinda similar but far less involved: a very lo-fi, no computer involved thing to do is an ultralong photographic exposure (months, a year, longer) with a pinhole camera.<p>The results are quite artistic IMO [1], the camera is fire-and-forget and you don't need any chemicals to develop the image. Just photograph/scan the photographic paper and invert the colors.<p>I'm not affiliated with them, but Solarcan sells ready made single-use pinhole cameras. An almost zero-regret purchase I'd say.<p>[1] You see the sun move through one year of skies, as seen from my balcony: <a href="https://files.rombouts.email/IMG_6500.jpeg" rel="nofollow">https://files.rombouts.email/IMG_6500.jpeg</a><p>People have made wonderful, mildly spooky pictures with these: <a href="https://solarcan.co.uk/wp-content/uploads/2018/05/solarcan-post-invert-12-expanded-text.jpg" rel="nofollow">https://solarcan.co.uk/wp-content/uploads/2018/05/solarcan-p...</a>