Multiple Choice
In which site in the universe has a supermassive black hole been proposed to account for recent observations?
A) the center of the Milky Way
B) the center of the Ring Nebula, a planetary nebula in Lyra
C) the center of the universe, where the Big Bang occurred at the beginning of the universe
D) the center of the Crab Nebula, an old supernova remnant
Correct Answer:

Verified
Correct Answer:
Verified
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