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🌌 Hubble Diagram: Velocity vs. Distance Fit (2D)

2D companion to the Hubble expansion simulator: a real Hubble diagram — redshift-derived recession velocity plotted against distance for a scatter of galaxies, with an adjustable H0 line you fit to the data by eye.

Cosmology2DEasy60 FPS📱 Mobile-adapted⇄ 3D version

⚙ Under the hood

A 2D companion to the 3D Hubble expansion simulator: the canonical Hubble diagram, plotting redshift-derived galaxy recession velocity against distance. Drag the H0 line to fit the scattered data points by eye, then reveal the least-squares best-fit line. Add galaxies to see how random peculiar velocities create scatter around the v = H0*d relation.

cosmologyhubble-lawredshiftdata-fittingastronomy

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