This is a heavily interactive web application, and JavaScript is required. Simple HTML interfaces are possible, but that is not what this is.
Post
Randall Munroe
xkcd.com
did:plc:cz73r7iyiqn26upot4jtjdhk
Airplane contrails can cast shadows on a blue sky, and the geometry can be a little brain-breaking. (In this photo, the sun and the airplane are both behind me.)
2023-05-02T01:33:12.739Z