💥 Big Bang and Cosmic Expansion: 2D Hubble Flow

Interactive 2D map of an expanding universe driven by the Friedmann equations: pick any galaxy as the observer, watch recession velocities follow Hubble's law, and see the Hubble sphere where v = c grow or shrink for matter, dark-energy, open and closed cosmologies.

2D · HTML5 Canvas 2D · 60 FPS target · runs fully client-side, no install