Question
It is likely that most galaxies contain supermassive black holes, yet in many galaxies there is no obvious evidence for their existence. Why do some black holes reveal their presence while others do not?
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Some black holes are in an active phase while others are not. Show more…
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It is likely that most galaxies contain supermassive black holes, yet many galaxies display no obvious evidence for their existence. Why do some black holes reveal their presence while others do not?
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