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Which galaxy contains the supermassive black hole imaged by the Event Horizon Telescope in 2019?
Answer
Messier 87
Which theory of gravity first predicted black holes as solutions to its field equations?
Answer
General relativity
For a Schwarzschild black hole, the photon sphere lies at how many Schwarzschild radii?
Answer
1.5 Schwarzschild radii
Which process can power black hole jets by extracting rotational energy through magnetic fields?
Answer
Blandford-Znajek process
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Which theory of gravity first predicted black holes as solutions to its field equations?
Answer
General relativity
For a Schwarzschild black hole, the photon sphere lies at how many Schwarzschild radii?
Answer
1.5 Schwarzschild radii
Which process can power black hole jets by extracting rotational energy through magnetic fields?
Answer
Blandford-Znajek process
What hypothetical black hole type could have formed soon after the Big Bang?
Answer
Primordial black hole
Which exact solution describes a black hole that has both electric charge and rotation?
Answer
Kerr-Newman metric