Where Have All the Quasars Gone?

The video explores the nature of supermassive black holes, focusing on their mass, age, and distribution in the universe. It highlights the paradox of younger black holes being more massive, using TON 618 as a case study. The challenges of observing black holes, the role of quasars, and the impact of the universe's expansion on black hole growth are discussed. The video also contrasts elliptical and spiral galaxies in terms of black hole size and star formation.

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