Sky at Night Magazine - - BULLETIN -

Some of the most mas­sive black holes ever seen have been un­cov­ered 3.5 bil­lion lightyears away. They are es­ti­mated to be 10 bil­lion times the mass of the Sun, mak­ing them ul­tra­mas­sive black holes. “Are they so big be­cause they had a head start or be­cause cer­tain ideal con­di­tions al­lowed them to grow more rapidly over bil­lions of years? For the mo­ment, there is no way for us to know,” says Mar Mezcua from the In­sti­tute of Space Sciences in Spain, who took part in the study.

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