Supermassive black holes (SMBHs)--black holes with masses exceeding a million times that of the sun--are known to prevail in the universe today. However, it is not clear yet when, where, and how they formed during the 13.8 billion years of cosmic history.
Supermassive black holes (SMBHs)--black holes with masses exceeding a million times that of the sun--are known to prevail in the universe today. However, it is not clear yet when, where, and how they formed during the 13.8 billion years of cosmic history.
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