Which of the following is evidence that the object known as Sagittarius A* is a supermassive black hole?
A) The Milky Way currently has a powerful active nucleus (AGN) .
B) Star orbits imply a large, invisible mass.
C) Gravitational waves from the central region are consistent with a supermassive black hole.
D) A large accretion disk of gas can be resolved in visible light.
E) The event horizon can be viewed through powerful telescopes.
Correct Answer:
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