The photo
The image at the top of the front page was taken by JunoCam on NASA’s Juno spacecraft. Credit: NASA / JPL-Caltech / SwRI / MSSS, image processing by Gerald Eichstädt and Seán Doran, CC BY-NC-SA. It is published as PIA21972, “Jupiter Blues”.
The moving clouds
The clouds are a fluid simulation running on your graphics card. The photograph itself never moves. A displacement field is carried along by the simulated flow, and every frame the photo is drawn through it, so the image stays sharp and slowly returns to what Juno saw. Moving the pointer pushes the fluid; circling one of the storms spins it up. How it works.
The distance to Jupiter under the photo is computed in your browser from mean orbital elements.
Building blocks
Astro, hosted on Cloudflare. Writing is drafted in Obsidian and published from there.