from ~13 billion years agoReputable sourceWell documented
Supermassive Black Holes and Quasars
On the timeline · around from ~13 billion years ago · The Age of Galaxies
What happened
Black holes millions to billions of times the mass of the Sun grew at the centres of early galaxies. Feeding on surrounding gas, they blazed as quasars — among the most luminous objects in the entire universe.
Why it matters
Nearly every large galaxy, including the Milky Way, harbours a supermassive black hole at its heart that helps shape the galaxy around it.
Sources
- NASA. Black Holes · Reputable source