Black hole — black hole accretion disk simulation

Keplerian particles spiral into an accretion disk; foreground gets stretched and swallowed, background galaxies stay put. Click fires polar jets.

How it works

~800 Keplerian particles on tilted orbits form the accretion disk; Doppler beaming brightens the approaching limb; back/front halves drawn either side of the shadow.

Two layers. Foreground (dust, stars, planets, comets, smaller decorative holes) gets pulled in, stretched, redshifted, swallowed. Background (galaxies, distant stars, nebulae) is too far to be touched and stays put even when the hole passes through.

Hole drifts toward the cursor at ~2.5%/16ms — deliberate lag, not snap. Click fires polar jets.

Related simulations

• Gravitational lensingInverse ray-tracing through a Schwarzschild deflection — the cursor is the lens, distorting a starfield. Click stacks a mass pulse.
• Solar systemEight planets at compressed orbits seeded from J2026.0; Earth's moon, Saturn's ring. Cursor x scales angular velocity; y tilts the plane.
• Meteor showerMeteors streak diagonally toward a horizon silhouette. Cursor casts an atmosphere bubble that ignites them; click launches a large meteor.
• Lorenz attractorFour points integrate the Lorenz system (σ=10, ρ=28, β=8/3) — the butterfly attractor. Cursor pulls the integration target; click reseeds.

Categories: Space & astronomy.