Discovery of quasar variability and early accretion disk signatures at cosmic dawn

Astronomers have successfully detected multiwavelength variability in a quasar existing 850 million years after the Big Bang. This discovery provides new data on the structure of accretion disks and the growth of supermassive black holes in the early universe.
Why it matters
Understanding early black hole growth is fundamental to our knowledge of how galaxies and the universe evolved shortly after the Big Bang.
Nature Astronomy ( 2026 ) Cite this article
The article is a summary of peer-reviewed scientific research and maintains a neutral, objective tone.
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