Rotating black hole

A rotating black hole is a black hole that possesses angular momentum. In particular, it rotates about one of its axes of symmetry.

All celestial objects – planets, stars (Sun), galaxies, black holes – spin.[1][2][3]

The boundaries of a Kerr black hole relevant to astrophysics. Note that there are no physical "surfaces" as such. The boundaries are mathematical surfaces, or sets of points in spacetime, relevant to analysis of the black hole's properties and interactions.[4]: 35 
  1. ^ "Why and how do planets rotate?". Scientific American. 14 April 2003.
  2. ^ Siegel, Ethan (1 August 2019). "This Is Why Black Holes Must Spin At Almost The Speed Of Light". Forbes.
  3. ^ Walty, Robert (22 July 2019). "It is said that most black holes likely have spin. What exactly is it that spins?". Astronomy.com.
  4. ^ Visser, Matt (15 January 2008). "The Kerr spacetime: A brief introduction". arXiv:0706.0622 [gr-qc].