Can we tell black holes apart?

Side-by-side comparison of the accretion flow onto a Kerr black hole in general relativity (left) and a dilaton black hole (right).

Orbiting the supermassive black hole in our Milky Way (VR movie)

Credits: J. Davelaar, M. Moscibrodzka, T. Bronzwaer & H. Falcke
Radboud University Nijmegen

Falling into a black hole (VR movie)