An international team of astronomers, led by the University of Cambridge, discovered a massive black hole just 800 million years after the Big Bang using the James Webb Space Telescope.
The black hole is 400 million times the mass of our Sun, constituting about 40% of its host galaxy's mass, challenging existing black hole formation models.
Professor Roberto Maiolino suggested that black holes may 'be born big' but also go through 'periods of hyperactivity' followed by long intervals of dormancy.
Analysis indicates black holes feed for 5 to 10 million years and then enter dormancy for about 100 million years, making them less luminous and harder to detect.
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