This is a heavily interactive web application, and JavaScript is required. Simple HTML interfaces are possible, but that is not what this is.
Post
Markus Pössel
mpoessel.de
did:plc:4aa2mtfyjewhfg7uinr7hti4
So that’s the short version. For those who want to dig deeper, here are some links. Here is the classical paper that convinced many readers that some variety of expanding space is the way to go. It doesn’t make use of the relativistic generalization of relative motion, though: 15/
https://arxiv.org/abs/astro-ph/0310808
2025-08-20T13:33:10.912Z