Black Hole Explorer

Explore black-hole size, Kerr shadows, stable orbits and Hawking estimates from one mass.

The drawing is a nonrotating reference. Kerr radii are Boyer–Lindquist coordinates, not proper distances.

Critical curve seen by a distant observer in vacuum. This is not an image of glowing gas.

Geometric projection of prograde (solid blue) and retrograde (dashed amber) ISCOs; no ray tracing.

Nonrotating vacuum estimate at the selected mass, even when the shadow spin is nonzero. Power and lifetime use a photon-only blackbody approximation without accretion or greybody factors.