The seed of this black hole must have formed by a different mechanism
Thirteen billion years after its light began its journey, a quasar known as J0313-1806 has arrived in human awareness — carrying with it a quiet disruption to our understanding of cosmic origins. Discovered by astronomers and announced in January 2021, this ancient beacon existed just 670 million years after the Big Bang, powered by a black hole so massive it should not yet have been possible. In confronting this impossibility, science is invited to revise its story of how the universe first organized itself into the structures we now call home.
- A black hole weighing 1.6 billion times the mass of our sun existed when the universe was barely an infant — twice as massive as any previously known at that age, and far too large for current theory to explain.
- The quasar blazes a thousand times brighter than the entire Milky Way, its jets hurling gas outward at twenty percent the speed of light, actively dismantling the very galaxy it inhabits.
- Conventional models of black hole formation — relying on stellar collapse or dense star clusters — cannot account for such enormous mass accumulating in only a few hundred million years.
- Researchers now propose that vast clouds of primordial hydrogen gas may have collapsed directly into seed black holes, bypassing the slow stellar route entirely.
- The host galaxy is forming stars two hundred times faster than the Milky Way today, yet the quasar's outflow is already on course to extinguish that stellar birth — a preview of why the universe's largest galaxies eventually went quiet.
- The discovery reframes cosmic reionization as a process shaped early and aggressively by supermassive black holes, opening urgent new questions for the next generation of telescopes.
Astronomers have identified the most distant quasar ever observed — a blazing galactic core whose light took more than thirteen billion years to reach Earth. Catalogued as J0313-1806, it offers a window into the universe just 670 million years after the Big Bang, and at its center sits a supermassive black hole 1.6 billion times the mass of our sun. The announcement came at the American Astronomical Society's annual meeting in January 2021, and it arrived with a problem: this black hole is too large to have formed by any mechanism astronomers currently accept.
A quasar is powered by a black hole consuming surrounding gas, heating it to extremes and radiating energy across the cosmos. The jets from J0313-1806 move at twenty percent the speed of light, expelling the very material needed to build new stars. The quasar itself outshines the entire Milky Way by a factor of a thousand. Lead researcher Feige Wang of the University of Arizona noted that black holes born from the first massive stars simply could not have grown this heavy in so little time — pointing instead toward a faster mechanism, in which enormous quantities of cold primordial hydrogen collapsed directly into a seed black hole.
The black hole devours the equivalent of twenty-five suns each year, generating outflows that will eventually suffocate star formation in its host galaxy — even as that galaxy currently produces stars two hundred times faster than the Milky Way. Coauthor Xiaohui Fan suggested this dynamic may explain why the universe's most massive galaxies stopped forming stars at some point in their histories.
Beyond the record-breaking numbers, the discovery carries a deeper significance: it places a supermassive black hole actively reshaping its surroundings at an epoch when such influence was thought to be rare. It forces a reckoning with how the first structures of the universe assembled themselves, and promises that more powerful future telescopes will have much still to reveal.
Astronomers have found the most distant quasar ever observed—a brilliant, compact object at the heart of a distant galaxy that blazes with the energy of ten trillion suns. The light from this quasar, catalogued as J0313-1806, has traveled more than thirteen billion years to reach Earth, allowing scientists to glimpse what the universe looked like just 670 million years after the Big Bang. The discovery, announced at the American Astronomical Society's annual meeting in January 2021, reveals something that challenges how astronomers thought the early cosmos worked: a supermassive black hole so massive it shouldn't have had time to form.
A quasar is the energetic core of a galaxy, powered by a supermassive black hole that acts like an engine. As gas spirals into the black hole, it heats to extreme temperatures and radiates energy across the electromagnetic spectrum. The jets that shoot outward from this maelstrom move at twenty percent the speed of light and carry away the very material galaxies need to birth new stars. In this case, the black hole at the center of J0313-1806 weighs roughly 1.6 billion times what our sun does—twice as heavy as the previous record holder. The quasar itself shines a thousand times brighter than the entire Milky Way.
What puzzles astronomers is how this black hole grew so large so quickly. According to conventional theory, supermassive black holes form when massive stars die and collapse, or when dense clusters of stars implode. Both processes take time—far more time than the few hundred million years that had elapsed since the Big Bang when this quasar was already fully formed and actively feeding. Feige Wang, the lead researcher and a NASA Hubble fellow at the University of Arizona, put it plainly: black holes created from the first massive stars could not have grown this large in only a few hundred million years. The discovery suggests an alternative mechanism must be at work, one in which vast quantities of primordial, cold hydrogen gas collapsed directly into a seed black hole—a process that could happen much faster than stellar collapse.
The black hole's appetite is staggering. It consumes material equivalent to about twenty-five suns each year, an intake so voracious that it powers an outflow of gas moving at tremendous speeds. This outflow is consequential: it sweeps away the hydrogen and other elements that galaxies need to form new stars. The host galaxy of J0313-1806 is currently producing stars at a rate two hundred times faster than the Milky Way, yet the quasar's outflow will eventually choke off that star formation. Xiaohui Fan, a coauthor of the study and regents professor of astronomy at the University of Arizona, suggested that supermassive black holes like this one may be responsible for why many of the universe's largest galaxies stopped forming stars at some point in their history.
The discovery matters because it forces a reckoning with how we understand the early universe. Quasars are signposts of cosmic reionization, the last major phase transition the universe underwent, when the first galaxies and black holes began to reshape their surroundings. By observing J0313-1806, astronomers are seeing direct evidence of a supermassive black hole affecting its galaxy at an epoch when such influence was thought to be rare or impossible. Wang noted that observations of more nearby galaxies had shown this process must occur, but seeing it happen so early in cosmic history is unprecedented. The discovery opens new questions about the mechanisms that seeded the first black holes and how the universe's most massive galaxies assembled themselves in the first few hundred million years after the Big Bang. Future observations with more powerful telescopes promise to reveal even more about this distant, brilliant object and the cosmic processes it illuminates.
Notable Quotes
This is the earliest evidence of how a supermassive black hole is affecting the galaxy around it. From observations of less distant galaxies, we know that this has to happen, but we have never seen it happening so early in the Universe.— Feige Wang, lead study author, NASA Hubble fellow at the University of Arizona
The seed of this black hole must have formed by a different mechanism—one involving vast quantities of primordial, cold hydrogen gas directly collapsing into a seed black hole.— Xiaohui Fan, study coauthor, regents professor of astronomy at the University of Arizona
The Hearth Conversation Another angle on the story
How do we even see something so far away? Doesn't the light just get too faint?
The quasar itself is extraordinarily bright—ten trillion times brighter than our sun. That's why, even after thirteen billion years of traveling through space, it's still detectable. We're not seeing a faint whisper; we're seeing a cosmic beacon.
But why does it matter that this black hole formed so early? Black holes exist now, so they must have formed at some point.
The problem is timing. The conventional way black holes grow—from stellar collapse—requires centuries or millennia to build up to this mass. We're talking about a black hole 1.6 billion times the sun's mass existing only 670 million years after the Big Bang. That's like finding a fully grown oak tree in a forest that's only a few years old.
So what's the alternative? How else could it have formed?
The leading idea now is that primordial hydrogen gas—the simplest, most abundant material in the early universe—collapsed directly into a black hole seed without needing a star to die first. It's a faster pathway, but it requires conditions we're still trying to understand.
And this quasar is destroying its own galaxy's ability to make stars?
Not destroying, but suppressing. The black hole is consuming material so rapidly that it's blowing away the gas the galaxy needs for star formation. It's like the black hole is eating the seeds before the galaxy can plant them.
Does that mean all big galaxies have this happen to them?
That's what the data suggests. We see massive galaxies today that stopped forming stars billions of years ago. This quasar might be showing us the mechanism—the moment when a black hole's appetite becomes so great it starves its host galaxy of the fuel to keep growing.