Question

why black holes spin?​

Answer 1

Answer:

Black holes formed after the Big Bang as stars evolved and died. And because the stars that created the black holes were originally spinning, so were their progeny. Indeed, even though stars eventually run out of nuclear fuel, they maintain their spin after death.

Answer 2

Answer:

Rotating black holes are formed in the gravitational collapse of a massivespinning star or from the collapse or collision of a collection of compact objects, stars, or gas with a total non-zero angular momentum. ... In late 2006, astronomers reported estimates of thespin rates of black holes in The Astrophysical Journal.

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